77776704 has 42 divisors (see below), whose sum is σ = 222934530. Its totient is φ = 25925376.

The previous prime is 77776703. The next prime is 77776711. The reversal of 77776704 is 40767777.

It can be written as a sum of positive squares in only one way, i.e., 51151104 + 26625600 = 7152^2 + 5160^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 77776704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77776703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66939 + ... + 68090.

It is an arithmetic number, because the mean of its divisors is an integer number (5307965).

Almost surely, 2^77776704 is an apocalyptic number.

It is an amenable number.

77776704 is an abundant number, since it is smaller than the sum of its proper divisors (145157826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77776704 is a wasteful number, since it uses less digits than its factorization.

77776704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135047 (or 135034 counting only the distinct ones).

The product of its (nonzero) digits is 403368, while the sum is 45.

The square root of 77776704 is about 8819.1101591941. The cubic root of 77776704 is about 426.8577572857.

The spelling of 77776704 in words is "seventy-seven million, seven hundred seventy-six thousand, seven hundred four".