65776680 has 48 divisors (see below), whose sum is σ = 213775380. Its totient is φ = 17540352.

The previous prime is 65776679. The next prime is 65776691. The reversal of 65776680 is 8667756.

It can be written as a sum of positive squares in 2 ways, for example, as 57790404 + 7986276 = 7602^2 + 2826^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90997 + ... + 91716.

Almost surely, 2^65776680 is an apocalyptic number.

65776680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65776680 is an abundant number, since it is smaller than the sum of its proper divisors (147998700).

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

65776680 is a wasteful number, since it uses less digits than its factorization.

65776680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182730 (or 182723 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The square root of 65776680 is about 8110.2823625321. The cubic root of 65776680 is about 403.6676841136.

The spelling of 65776680 in words is "sixty-five million, seven hundred seventy-six thousand, six hundred eighty".