66708868 has 24 divisors (see below), whose sum is σ = 119617344. Its totient is φ = 32541600.

The previous prime is 66708853. The next prime is 66708871. The reversal of 66708868 is 86880766.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30921 + ... + 33007.

It is an arithmetic number, because the mean of its divisors is an integer number (4984056).

Almost surely, 2^66708868 is an apocalyptic number.

It is an amenable number.

66708868 is a deficient number, since it is larger than the sum of its proper divisors (52908476).

66708868 is a wasteful number, since it uses less digits than its factorization.

66708868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2283 (or 2281 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 49.

The square root of 66708868 is about 8167.5496937576. The cubic root of 66708868 is about 405.5656740023.

It can be divided in two parts, 66708 and 868, that added together give a palindrome (67576).

The spelling of 66708868 in words is "sixty-six million, seven hundred eight thousand, eight hundred sixty-eight".