66309964 has 12 divisors (see below), whose sum is σ = 132619984. Its totient is φ = 28418544.

The previous prime is 66309949. The next prime is 66309977. The reversal of 66309964 is 46990366.

66309964 is an admirable number.

It is a super-2 number, since 2×66309964² = 8794022651362592, 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 66309964.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1184079 + ... + 1184134.

Almost surely, 2^66309964 is an apocalyptic number.

It is an amenable number.

66309964 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66309964 is a wasteful number, since it uses less digits than its factorization.

66309964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2368224 (or 2368222 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 66309964 is about 8143.0930241524. The cubic root of 66309964 is about 404.7556601671.

The spelling of 66309964 in words is "sixty-six million, three hundred nine thousand, nine hundred sixty-four".