77116580 has 12 divisors (see below), whose sum is σ = 161944860. Its totient is φ = 30846624.

The previous prime is 77116553. The next prime is 77116603. The reversal of 77116580 is 8561177.

It can be written as a sum of positive squares in 2 ways, for example, as 15745024 + 61371556 = 3968^2 + 7834^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 77116580.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1927895 + ... + 1927934.

It is an arithmetic number, because the mean of its divisors is an integer number (13495405).

Almost surely, 2^77116580 is an apocalyptic number.

It is an amenable number.

77116580 is an abundant number, since it is smaller than the sum of its proper divisors (84828280).

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

77116580 is a wasteful number, since it uses less digits than its factorization.

77116580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3855838 (or 3855836 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 35.

The square root of 77116580 is about 8781.6046369670. The cubic root of 77116580 is about 425.6466833226.

The spelling of 77116580 in words is "seventy-seven million, one hundred sixteen thousand, five hundred eighty".