77697608 has 8 divisors (see below), whose sum is σ = 145683030. Its totient is φ = 38848800.

The previous prime is 77697589. The next prime is 77697619. The reversal of 77697608 is 80679677.

It can be written as a sum of positive squares in only one way, i.e., 60871204 + 16826404 = 7802^2 + 4102^2 .

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, 4856093 + ... + 4856108.

Almost surely, 2^77697608 is an apocalyptic number.

It is an amenable number.

77697608 is a deficient number, since it is larger than the sum of its proper divisors (67985422).

77697608 is a wasteful number, since it uses less digits than its factorization.

77697608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9712207 (or 9712203 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 50.

The square root of 77697608 is about 8814.6246658607. The cubic root of 77697608 is about 426.7130087468.

The spelling of 77697608 in words is "seventy-seven million, six hundred ninety-seven thousand, six hundred eight".