66442252 has 6 divisors (see below), whose sum is σ = 116273948. Its totient is φ = 33221124.

The previous prime is 66442241. The next prime is 66442253. The reversal of 66442252 is 25224466.

It is not an unprimeable number, because it can be changed into a prime (66442253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8305278 + ... + 8305285.

Almost surely, 2^66442252 is an apocalyptic number.

It is an amenable number.

66442252 is a deficient number, since it is larger than the sum of its proper divisors (49831696).

66442252 is a wasteful number, since it uses less digits than its factorization.

66442252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16610567 (or 16610565 counting only the distinct ones).

The product of its digits is 23040, while the sum is 31.

The square root of 66442252 is about 8151.2116890681. The cubic root of 66442252 is about 405.0246431177.

The spelling of 66442252 in words is "sixty-six million, four hundred forty-two thousand, two hundred fifty-two".