76720655 has 24 divisors (see below), whose sum is σ = 101843952. Its totient is φ = 55440000.

The previous prime is 76720621. The next prime is 76720661. The reversal of 76720655 is 55602767.

It is not a de Polignac number, because 76720655 - 2¹² = 76716559 is a prime.

It is a Duffinian number.

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, 127355 + ... + 127955.

It is an arithmetic number, because the mean of its divisors is an integer number (4243498).

Almost surely, 2^76720655 is an apocalyptic number.

76720655 is a deficient number, since it is larger than the sum of its proper divisors (25123297).

76720655 is a wasteful number, since it uses less digits than its factorization.

76720655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 839 (or 828 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 38.

The square root of 76720655 is about 8759.0327662362. The cubic root of 76720655 is about 424.9169941700.

The spelling of 76720655 in words is "seventy-six million, seven hundred twenty thousand, six hundred fifty-five".