77685316 has 12 divisors (see below), whose sum is σ = 140637420. Its totient is φ = 37503200.

The previous prime is 77685301. The next prime is 77685343. The reversal of 77685316 is 61358677.

It can be written as a sum of positive squares in 2 ways, for example, as 61685316 + 16000000 = 7854^2 + 4000^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334735 + ... + 334966.

It is an arithmetic number, because the mean of its divisors is an integer number (11719785).

Almost surely, 2^77685316 is an apocalyptic number.

It is an amenable number.

77685316 is a deficient number, since it is larger than the sum of its proper divisors (62952104).

77685316 is a wasteful number, since it uses less digits than its factorization.

77685316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669734 (or 669732 counting only the distinct ones).

The product of its digits is 211680, while the sum is 43.

The square root of 77685316 is about 8813.9273879469. The cubic root of 77685316 is about 426.6905051243.

The spelling of 77685316 in words is "seventy-seven million, six hundred eighty-five thousand, three hundred sixteen".