66442964 has 12 divisors (see below), whose sum is σ = 132885984. Its totient is φ = 28475544.

The previous prime is 66442939. The next prime is 66442993. The reversal of 66442964 is 46924466.

66442964 is an admirable number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 1186454 + ... + 1186509.

It is an arithmetic number, because the mean of its divisors is an integer number (11073832).

Almost surely, 2^66442964 is an apocalyptic number.

It is an amenable number.

66442964 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.

66442964 is a wasteful number, since it uses less digits than its factorization.

66442964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372974 (or 2372972 counting only the distinct ones).

The product of its digits is 248832, while the sum is 41.

The square root of 66442964 is about 8151.2553634394. The cubic root of 66442964 is about 405.0260898704.

The spelling of 66442964 in words is "sixty-six million, four hundred forty-two thousand, nine hundred sixty-four".