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87766666663321 = 317338783325967
BaseRepresentation
bin10011111101001011000100…
…111111010101010110011001
3102111202102002220101210022201
4103331023010333111112121
543000432113131211241
6510355241113250201
724325634550365152
oct2375130477252631
9374672086353281
1087766666663321
1125a686a8293a48
129a15927103961
1339c84905ba149
141795d02130929
15a2302bd65931
hex4fd2c4fd5599

87766666663321 has 8 divisors (see below), whose sum is σ = 91838915892224. Its totient is φ = 83771984086560.

The previous prime is 87766666663279. The next prime is 87766666663373. The reversal of 87766666663321 is 12336666666778.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-87766666663321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (73).

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (87766666664321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19391660721 + ... + 19391665246.

It is an arithmetic number, because the mean of its divisors is an integer number (11479864486528).

Almost surely, 287766666663321 is an apocalyptic number.

87766666663321 is the 5408841-st hex number.

It is an amenable number.

87766666663321 is a deficient number, since it is larger than the sum of its proper divisors (4072249228903).

87766666663321 is a wasteful number, since it uses less digits than its factorization.

87766666663321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38783326071.

The product of its digits is 1975228416, while the sum is 73.

The spelling of 87766666663321 in words is "eighty-seven trillion, seven hundred sixty-six billion, six hundred sixty-six million, six hundred sixty-three thousand, three hundred twenty-one".