77650680 has 64 divisors (see below), whose sum is σ = 235929600. Its totient is φ = 20442240.

The previous prime is 77650673. The next prime is 77650709. The reversal of 77650680 is 8605677.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5385 + ... + 13575.

It is an arithmetic number, because the mean of its divisors is an integer number (3686400).

Almost surely, 2^77650680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77650680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117964800).

77650680 is an abundant number, since it is smaller than the sum of its proper divisors (158278920).

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

77650680 is a wasteful number, since it uses less digits than its factorization.

77650680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8284 (or 8280 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 77650680 is about 8811.9623240230. The cubic root of 77650680 is about 426.6270823737.

The spelling of 77650680 in words is "seventy-seven million, six hundred fifty thousand, six hundred eighty".