76721066175564 has 72 divisors (see below), whose sum is σ = 197042606062848. Its totient is φ = 25166902744800.

The previous prime is 76721066175461. The next prime is 76721066175583. The reversal of 76721066175564 is 46557166012767.

76721066175564 is a `hidden beast` number, since 7 + 6 + 7 + 2 + 1 + 0 + 6 + 61 + 7 + 5 + 564 = 666.

It is a super-2 number, since 2×76721066175564² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65369352 + ... + 66532655.

It is an arithmetic number, because the mean of its divisors is an integer number (2736702861984).

Almost surely, 2^{76721066175564} is an apocalyptic number.

It is an amenable number.

76721066175564 is an abundant number, since it is smaller than the sum of its proper divisors (120321539887284).

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

76721066175564 is a wasteful number, since it uses less digits than its factorization.

76721066175564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131902275 (or 131902270 counting only the distinct ones).

The product of its (nonzero) digits is 88905600, while the sum is 63.

The spelling of 76721066175564 in words is "seventy-six trillion, seven hundred twenty-one billion, sixty-six million, one hundred seventy-five thousand, five hundred sixty-four".