66913008 has 20 divisors (see below), whose sum is σ = 172858728. Its totient is φ = 22304320.

The previous prime is 66913001. The next prime is 66913009. The reversal of 66913008 is 80031966.

It is a self number, because there is not a number n which added to its sum of digits gives 66913008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66913001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696963 + ... + 697058.

Almost surely, 2^66913008 is an apocalyptic number.

It is an amenable number.

66913008 is an abundant number, since it is smaller than the sum of its proper divisors (105945720).

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

66913008 is a wasteful number, since it uses less digits than its factorization.

66913008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394032 (or 1394026 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 66913008 is about 8180.0371637298. The cubic root of 66913008 is about 405.9789517266.

The spelling of 66913008 in words is "sixty-six million, nine hundred thirteen thousand, eight".