77665052 has 12 divisors (see below), whose sum is σ = 139074936. Its totient is φ = 37929360.

The previous prime is 77665037. The next prime is 77665069. The reversal of 77665052 is 25056677.

It is a junction number, because it is equal to n+sod(n) for n = 77664997 and 77665015.

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, 225599 + ... + 225942.

It is an arithmetic number, because the mean of its divisors is an integer number (11589578).

Almost surely, 2^77665052 is an apocalyptic number.

It is an amenable number.

77665052 is a deficient number, since it is larger than the sum of its proper divisors (61409884).

77665052 is a wasteful number, since it uses less digits than its factorization.

77665052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451588 (or 451586 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 38.

The square root of 77665052 is about 8812.7777686720. Note that the first 4 decimals coincide. The cubic root of 77665052 is about 426.6534015516.

The spelling of 77665052 in words is "seventy-seven million, six hundred sixty-five thousand, fifty-two".