76772655 has 24 divisors (see below), whose sum is σ = 134952480. Its totient is φ = 40367040.

The previous prime is 76772639. The next prime is 76772659. The reversal of 76772655 is 55627767.

It is not a de Polignac number, because 76772655 - 2⁴ = 76772639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 76772655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76772659) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8820 + ... + 15209.

It is an arithmetic number, because the mean of its divisors is an integer number (5623020).

Almost surely, 2^76772655 is an apocalyptic number.

76772655 is a deficient number, since it is larger than the sum of its proper divisors (58179825).

76772655 is a wasteful number, since it uses less digits than its factorization.

76772655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24111 (or 24108 counting only the distinct ones).

The product of its digits is 617400, while the sum is 45.

The square root of 76772655 is about 8762.0006277105. Note that the first 3 decimals coincide. The cubic root of 76772655 is about 425.0129730757.

The spelling of 76772655 in words is "seventy-six million, seven hundred seventy-two thousand, six hundred fifty-five".