66565008 has 60 divisors (see below), whose sum is σ = 186863040. Its totient is φ = 22120128.

The previous prime is 66565007. The next prime is 66565043. The reversal of 66565008 is 80056566.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (66565001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71973 + ... + 72891.

It is an arithmetic number, because the mean of its divisors is an integer number (3114384).

Almost surely, 2^66565008 is an apocalyptic number.

It is an amenable number.

66565008 is an abundant number, since it is smaller than the sum of its proper divisors (120298032).

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

66565008 is a wasteful number, since it uses less digits than its factorization.

66565008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436 (or 1427 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 66565008 is about 8158.7381377269. The cubic root of 66565008 is about 405.2739253403.

It can be divided in two parts, 6656 and 5008, that added together give a square (11664 = 108²).

The spelling of 66565008 in words is "sixty-six million, five hundred sixty-five thousand, eight".