66305944 has 16 divisors (see below), whose sum is σ = 124522200. Its totient is φ = 33100032.

The previous prime is 66305929. The next prime is 66305951. The reversal of 66305944 is 44950366.

It is a happy number.

It is a super-2 number, since 2×66305944² = 8792956419462272, which contains 22 as substring.

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, 1017 + ... + 11560.

Almost surely, 2^66305944 is an apocalyptic number.

It is an amenable number.

66305944 is a deficient number, since it is larger than the sum of its proper divisors (58216256).

66305944 is a wasteful number, since it uses less digits than its factorization.

66305944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13242 (or 13238 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 66305944 is about 8142.8461854563. The cubic root of 66305944 is about 404.7474806491.

The spelling of 66305944 in words is "sixty-six million, three hundred five thousand, nine hundred forty-four".