66711164 has 12 divisors (see below), whose sum is σ = 125724984. Its totient is φ = 30789744.

The previous prime is 66711157. The next prime is 66711181. The reversal of 66711164 is 46111766.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 66711164.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641402 + ... + 641505.

It is an arithmetic number, because the mean of its divisors is an integer number (10477082).

Almost surely, 2^66711164 is an apocalyptic number.

It is an amenable number.

66711164 is a deficient number, since it is larger than the sum of its proper divisors (59013820).

66711164 is a wasteful number, since it uses less digits than its factorization.

66711164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282924 (or 1282922 counting only the distinct ones).

The product of its digits is 6048, while the sum is 32.

The square root of 66711164 is about 8167.6902487790. The cubic root of 66711164 is about 405.5703268975.

The spelling of 66711164 in words is "sixty-six million, seven hundred eleven thousand, one hundred sixty-four".