76721310667725 has 24 divisors (see below), whose sum is σ = 128374164173472. Its totient is φ = 40425044011200.

The previous prime is 76721310667709. The next prime is 76721310667733. The reversal of 76721310667725 is 52776601312767.

It is not a de Polignac number, because 76721310667725 - 2⁴ = 76721310667709 is a prime.

It is a congruent number.

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, 6162348046 + ... + 6162360495.

It is an arithmetic number, because the mean of its divisors is an integer number (5348923507228).

Almost surely, 2^{76721310667725} is an apocalyptic number.

76721310667725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

76721310667725 is a deficient number, since it is larger than the sum of its proper divisors (51652853505747).

76721310667725 is a wasteful number, since it uses less digits than its factorization.

76721310667725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12324708637 (or 12324708632 counting only the distinct ones).

The product of its (nonzero) digits is 31116960, while the sum is 60.

The spelling of 76721310667725 in words is "seventy-six trillion, seven hundred twenty-one billion, three hundred ten million, six hundred sixty-seven thousand, seven hundred twenty-five".