66250664 has 16 divisors (see below), whose sum is σ = 125793600. Its totient is φ = 32705712.

The previous prime is 66250661. The next prime is 66250669. The reversal of 66250664 is 46605266.

It is not an unprimeable number, because it can be changed into a prime (66250661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51782 + ... + 53045.

It is an arithmetic number, because the mean of its divisors is an integer number (7862100).

Almost surely, 2^66250664 is an apocalyptic number.

It is an amenable number.

66250664 is a deficient number, since it is larger than the sum of its proper divisors (59542936).

66250664 is a wasteful number, since it uses less digits than its factorization.

66250664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104912 (or 104908 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 66250664 is about 8139.4510871434. The cubic root of 66250664 is about 404.6349685564.

The spelling of 66250664 in words is "sixty-six million, two hundred fifty thousand, six hundred sixty-four".