66808512 has 42 divisors (see below), whose sum is σ = 191496188. Its totient is φ = 22269312.

The previous prime is 66808501. The next prime is 66808519. The reversal of 66808512 is 21580866.

It is a happy number.

66808512 is a `hidden beast` number, since 66 + 80 + 8 + 512 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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 (66808519) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 57418 + ... + 58569.

Almost surely, 2^66808512 is an apocalyptic number.

It is an amenable number.

66808512 is an abundant number, since it is smaller than the sum of its proper divisors (124687676).

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

66808512 is a wasteful number, since it uses less digits than its factorization.

66808512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116005 (or 115992 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 66808512 is about 8173.6474110399. The cubic root of 66808512 is about 405.7675066446.

The spelling of 66808512 in words is "sixty-six million, eight hundred eight thousand, five hundred twelve".