13680777 has 16 divisors (see below), whose sum is σ = 20183040. Its totient is φ = 8173200.

The previous prime is 13680773. The next prime is 13680809. The reversal of 13680777 is 77708631.

It is not a de Polignac number, because 13680777 - 2² = 13680773 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13680773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 577 + ... + 5262.

It is an arithmetic number, because the mean of its divisors is an integer number (1261440).

Almost surely, 2^13680777 is an apocalyptic number.

It is an amenable number.

13680777 is a deficient number, since it is larger than the sum of its proper divisors (6502263).

13680777 is a wasteful number, since it uses less digits than its factorization.

13680777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5924.

The product of its (nonzero) digits is 49392, while the sum is 39.

The square root of 13680777 is about 3698.7534386601. The cubic root of 13680777 is about 239.1682842276.

The spelling of 13680777 in words is "thirteen million, six hundred eighty thousand, seven hundred seventy-seven".