65668580 has 12 divisors (see below), whose sum is σ = 137904060. Its totient is φ = 26267424.

The previous prime is 65668573. The next prime is 65668591. The reversal of 65668580 is 8586656.

65668580 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 2 ways, for example, as 45454564 + 20214016 = 6742^2 + 4496^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1641695 + ... + 1641734.

It is an arithmetic number, because the mean of its divisors is an integer number (11492005).

Almost surely, 2^65668580 is an apocalyptic number.

It is an amenable number.

65668580 is an abundant number, since it is smaller than the sum of its proper divisors (72235480).

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

65668580 is a wasteful number, since it uses less digits than its factorization.

65668580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3283438 (or 3283436 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 44.

The square root of 65668580 is about 8103.6152425939. The cubic root of 65668580 is about 403.4464283781.

The spelling of 65668580 in words is "sixty-five million, six hundred sixty-eight thousand, five hundred eighty".