66908868 has 48 divisors (see below), whose sum is σ = 168685440. Its totient is φ = 20519424.

The previous prime is 66908837. The next prime is 66908869. The reversal of 66908868 is 86880966.

It is a self number, because there is not a number n which added to its sum of digits gives 66908868.

It is not an unprimeable number, because it can be changed into a prime (66908869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67996 + ... + 68972.

It is an arithmetic number, because the mean of its divisors is an integer number (3514280).

Almost surely, 2^66908868 is an apocalyptic number.

It is an amenable number.

66908868 is an abundant number, since it is smaller than the sum of its proper divisors (101776572).

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

66908868 is a wasteful number, since it uses less digits than its factorization.

66908868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436 (or 1434 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 51.

The square root of 66908868 is about 8179.7841047304. The cubic root of 66908868 is about 405.9705787282.

It can be divided in two parts, 66908 and 868, that added together give a palindrome (67776).

The spelling of 66908868 in words is "sixty-six million, nine hundred eight thousand, eight hundred sixty-eight".