66321952 has 24 divisors (see below), whose sum is σ = 132414912. Its totient is φ = 32692800.

The previous prime is 66321943. The next prime is 66321961. The reversal of 66321952 is 25912366.

It is an interprime number because it is at equal distance from previous prime (66321943) and next prime (66321961).

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, 12324 + ... + 16867.

It is an arithmetic number, because the mean of its divisors is an integer number (5517288).

Almost surely, 2^66321952 is an apocalyptic number.

It is an amenable number.

66321952 is a deficient number, since it is larger than the sum of its proper divisors (66092960).

66321952 is a wasteful number, since it uses less digits than its factorization.

66321952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29272 (or 29264 counting only the distinct ones).

The product of its digits is 19440, while the sum is 34.

The square root of 66321952 is about 8143.8290748271. The cubic root of 66321952 is about 404.7800502596.

The spelling of 66321952 in words is "sixty-six million, three hundred twenty-one thousand, nine hundred fifty-two".