77661152 has 12 divisors (see below), whose sum is σ = 152895456. Its totient is φ = 38830560.

The previous prime is 77661137. The next prime is 77661161. The reversal of 77661152 is 25116677.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1213424 + ... + 1213487.

It is an arithmetic number, because the mean of its divisors is an integer number (12741288).

Almost surely, 2^77661152 is an apocalyptic number.

It is an amenable number.

77661152 is a deficient number, since it is larger than the sum of its proper divisors (75234304).

77661152 is a wasteful number, since it uses less digits than its factorization.

77661152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2426921 (or 2426913 counting only the distinct ones).

The product of its digits is 17640, while the sum is 35.

The square root of 77661152 is about 8812.5564962728. The cubic root of 77661152 is about 426.6462598747.

The spelling of 77661152 in words is "seventy-seven million, six hundred sixty-one thousand, one hundred fifty-two".