66966512 has 20 divisors (see below), whose sum is σ = 130899360. Its totient is φ = 33186048.

The previous prime is 66966509. The next prime is 66966551. The reversal of 66966512 is 21566966.

It is a super-2 number, since 2×66966512² = 8969027458892288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66966512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16712 + ... + 20327.

It is an arithmetic number, because the mean of its divisors is an integer number (6544968).

Almost surely, 2^66966512 is an apocalyptic number.

It is an amenable number.

66966512 is a deficient number, since it is larger than the sum of its proper divisors (63932848).

66966512 is a wasteful number, since it uses less digits than its factorization.

66966512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37160 (or 37154 counting only the distinct ones).

The product of its digits is 116640, while the sum is 41.

The square root of 66966512 is about 8183.3069110232. The cubic root of 66966512 is about 406.0871305471.

The spelling of 66966512 in words is "sixty-six million, nine hundred sixty-six thousand, five hundred twelve".