77705652 has 12 divisors (see below), whose sum is σ = 181313216. Its totient is φ = 25901880.

The previous prime is 77705629. The next prime is 77705659. The reversal of 77705652 is 25650777.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 77705652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77705659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3237724 + ... + 3237747.

Almost surely, 2^77705652 is an apocalyptic number.

It is an amenable number.

77705652 is an abundant number, since it is smaller than the sum of its proper divisors (103607564).

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

77705652 is a wasteful number, since it uses less digits than its factorization.

77705652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6475478 (or 6475476 counting only the distinct ones).

The product of its (nonzero) digits is 102900, while the sum is 39.

The square root of 77705652 is about 8815.0809412052. The cubic root of 77705652 is about 426.7277340435.

The spelling of 77705652 in words is "seventy-seven million, seven hundred five thousand, six hundred fifty-two".