77769964 has 12 divisors (see below), whose sum is σ = 143260600. Its totient is φ = 36838368.

The previous prime is 77769959. The next prime is 77770009. The reversal of 77769964 is 46996777.

It is a happy number.

It is a super-2 number, since 2×77769964² = 12096334601122592, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 511569 + ... + 511720.

Almost surely, 2^77769964 is an apocalyptic number.

It is an amenable number.

77769964 is a deficient number, since it is larger than the sum of its proper divisors (65490636).

77769964 is a wasteful number, since it uses less digits than its factorization.

77769964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023312 (or 1023310 counting only the distinct ones).

The product of its digits is 4000752, while the sum is 55.

The square root of 77769964 is about 8818.7280261952. The cubic root of 77769964 is about 426.8454266680.

The spelling of 77769964 in words is "seventy-seven million, seven hundred sixty-nine thousand, nine hundred sixty-four".