87766666663278 has 8 divisors (see below), whose sum is σ = 175533333326568. Its totient is φ = 29255555554424.

The previous prime is 87766666663213. The next prime is 87766666663279. The reversal of 87766666663278 is 87236666666778.

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

87766666663278 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 87766666663278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87766666663279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7313888888601 + ... + 7313888888612.

It is an arithmetic number, because the mean of its divisors is an integer number (21941666665821).

Almost surely, 2^{87766666663278} is an apocalyptic number.

87766666663278 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87766666663278 is a wasteful number, since it uses less digits than its factorization.

87766666663278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14627777777218.

The product of its digits is 36870930432, while the sum is 84.

The spelling of 87766666663278 in words is "eighty-seven trillion, seven hundred sixty-six billion, six hundred sixty-six million, six hundred sixty-three thousand, two hundred seventy-eight".