66600768 has 56 divisors (see below), whose sum is σ = 189776608. Its totient is φ = 20491776.

The previous prime is 66600767. The next prime is 66600797. The reversal of 66600768 is 86700666.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66600761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10846 + ... + 15837.

It is an arithmetic number, because the mean of its divisors is an integer number (3388868).

Almost surely, 2^66600768 is an apocalyptic number.

It is an amenable number.

66600768 is an abundant number, since it is smaller than the sum of its proper divisors (123175840).

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

66600768 is a wasteful number, since it uses less digits than its factorization.

66600768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26711 (or 26701 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 66600768 is about 8160.9293588414. The cubic root of 66600768 is about 405.3464859921.

The spelling of 66600768 in words is "sixty-six million, six hundred thousand, seven hundred sixty-eight".