76646557067321 has 32 divisors (see below), whose sum is σ = 82742670581760. Its totient is φ = 70822938441024.

The previous prime is 76646557067257. The next prime is 76646557067341. The reversal of 76646557067321 is 12376075564667.

It is not a de Polignac number, because 76646557067321 - 2⁶ = 76646557067257 is a prime.

It is a super-2 number, since 2×76646557067321² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76646557067341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94973735 + ... + 95777363.

It is an arithmetic number, because the mean of its divisors is an integer number (2585708455680).

Almost surely, 2^{76646557067321} is an apocalyptic number.

It is an amenable number.

76646557067321 is a deficient number, since it is larger than the sum of its proper divisors (6096113514439).

76646557067321 is a wasteful number, since it uses less digits than its factorization.

76646557067321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804845.

The product of its (nonzero) digits is 266716800, while the sum is 65.

The spelling of 76646557067321 in words is "seventy-six trillion, six hundred forty-six billion, five hundred fifty-seven million, sixty-seven thousand, three hundred twenty-one".