77108816 has 20 divisors (see below), whose sum is σ = 149550324. Its totient is φ = 38515200.

The previous prime is 77108807. The next prime is 77108833. The reversal of 77108816 is 61880177.

It can be written as a sum of positive squares in 2 ways, for example, as 22052416 + 55056400 = 4696^2 + 7420^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 77108816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20006 + ... + 23546.

Almost surely, 2^77108816 is an apocalyptic number.

It is an amenable number.

77108816 is a deficient number, since it is larger than the sum of its proper divisors (72441508).

77108816 is a wasteful number, since it uses less digits than its factorization.

77108816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4910 (or 4904 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 38.

The square root of 77108816 is about 8781.1625654010. The cubic root of 77108816 is about 425.6323983195.

The spelling of 77108816 in words is "seventy-seven million, one hundred eight thousand, eight hundred sixteen".