77764168 has 8 divisors (see below), whose sum is σ = 145807830. Its totient is φ = 38882080.

The previous prime is 77764157. The next prime is 77764187. The reversal of 77764168 is 86146777.

It can be written as a sum of positive squares in only one way, i.e., 61748164 + 16016004 = 7858^2 + 4002^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4860253 + ... + 4860268.

Almost surely, 2^77764168 is an apocalyptic number.

It is an amenable number.

77764168 is a deficient number, since it is larger than the sum of its proper divisors (68043662).

77764168 is a wasteful number, since it uses less digits than its factorization.

77764168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9720527 (or 9720523 counting only the distinct ones).

The product of its digits is 395136, while the sum is 46.

The square root of 77764168 is about 8818.3994012519. The cubic root of 77764168 is about 426.8348224989.

The spelling of 77764168 in words is "seventy-seven million, seven hundred sixty-four thousand, one hundred sixty-eight".