77065920 has 84 divisors (see below), whose sum is σ = 265084560. Its totient is φ = 20550144.

The previous prime is 77065897. The next prime is 77065927. The reversal of 77065920 is 2956077.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (77065927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10500 + ... + 16259.

Almost surely, 2^77065920 is an apocalyptic number.

It is an amenable number.

77065920 is an abundant number, since it is smaller than the sum of its proper divisors (188018640).

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

77065920 is a wasteful number, since it uses less digits than its factorization.

77065920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26782 (or 26769 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 77065920 is about 8778.7197244245. The cubic root of 77065920 is about 425.5534565719.

The spelling of 77065920 in words is "seventy-seven million, sixty-five thousand, nine hundred twenty".