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66801468361 = 295431424139
BaseRepresentation
bin111110001101101011…
…011000001111001001
320101102111202012022211
4332031223120033021
52043302133441421
650404351145121
74553255053345
oct761553301711
9211374665284
1066801468361
112636a7619a1
1210b438151a1
1363b78a1294
143339cd0625
151b0e9029e1
hexf8dad83c9

66801468361 has 8 divisors (see below), whose sum is σ = 69117854400. Its totient is φ = 64485941520.

The previous prime is 66801468337. The next prime is 66801468443. The reversal of 66801468361 is 16386410866.

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

It is a cyclic number.

It is not a de Polignac number, because 66801468361 - 217 = 66801337289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66801468301) 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, 54571 + ... + 369568.

It is an arithmetic number, because the mean of its divisors is an integer number (8639731800).

Almost surely, 266801468361 is an apocalyptic number.

It is an amenable number.

66801468361 is a deficient number, since it is larger than the sum of its proper divisors (2316386039).

66801468361 is a wasteful number, since it uses less digits than its factorization.

66801468361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429599.

The product of its (nonzero) digits is 995328, while the sum is 49.

The spelling of 66801468361 in words is "sixty-six billion, eight hundred one million, four hundred sixty-eight thousand, three hundred sixty-one".

Divisors: 1 29 5431 157499 424139 12300031 2303498909 66801468361