65979680 has 48 divisors (see below), whose sum is σ = 167872824. Its totient is φ = 24360960.

The previous prime is 65979653. The next prime is 65979689. The reversal of 65979680 is 8697956.

65979680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 21196816 + 44782864 = 4604^2 + 6692^2 .

It is not an unprimeable number, because it can be changed into a prime (65979689) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 13781 + ... + 17940.

Almost surely, 2^65979680 is an apocalyptic number.

It is an amenable number.

65979680 is an abundant number, since it is smaller than the sum of its proper divisors (101893144).

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

65979680 is a wasteful number, since it uses less digits than its factorization.

65979680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31749 (or 31741 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 65979680 is about 8122.7876988138. The cubic root of 65979680 is about 404.0825240692.

The spelling of 65979680 in words is "sixty-five million, nine hundred seventy-nine thousand, six hundred eighty".