77766956 has 24 divisors (see below), whose sum is σ = 144426240. Its totient is φ = 36559952.

The previous prime is 77766947. The next prime is 77766961. The reversal of 77766956 is 65966777.

It is a junction number, because it is equal to n+sod(n) for n = 77766898 and 77766907.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1736 + ... + 12591.

It is an arithmetic number, because the mean of its divisors is an integer number (6017760).

Almost surely, 2^77766956 is an apocalyptic number.

It is an amenable number.

77766956 is a deficient number, since it is larger than the sum of its proper divisors (66659284).

77766956 is a wasteful number, since it uses less digits than its factorization.

77766956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14413 (or 14411 counting only the distinct ones).

The product of its digits is 3333960, while the sum is 53.

The square root of 77766956 is about 8818.5574784088. The cubic root of 77766956 is about 426.8399233969.

The spelling of 77766956 in words is "seventy-seven million, seven hundred sixty-six thousand, nine hundred fifty-six".