66579648 has 56 divisors (see below), whose sum is σ = 185440320. Its totient is φ = 21024000.

The previous prime is 66579637. The next prime is 66579649. The reversal of 66579648 is 84697566.

It is a self number, because there is not a number n which added to its sum of digits gives 66579648.

It is not an unprimeable number, because it can be changed into a prime (66579649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5478 + ... + 12773.

Almost surely, 2^66579648 is an apocalyptic number.

It is an amenable number.

66579648 is an abundant number, since it is smaller than the sum of its proper divisors (118860672).

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

66579648 is a wasteful number, since it uses less digits than its factorization.

66579648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18285 (or 18275 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 51.

The square root of 66579648 is about 8159.6352859671. The cubic root of 66579648 is about 405.3036345199.

The spelling of 66579648 in words is "sixty-six million, five hundred seventy-nine thousand, six hundred forty-eight".