66271944 has 32 divisors (see below), whose sum is σ = 169535520. Its totient is φ = 21576576.

The previous prime is 66271903. The next prime is 66271963. The reversal of 66271944 is 44917266.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31077 + ... + 33140.

It is an arithmetic number, because the mean of its divisors is an integer number (5297985).

Almost surely, 2^66271944 is an apocalyptic number.

It is an amenable number.

66271944 is an abundant number, since it is smaller than the sum of its proper divisors (103263576).

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

66271944 is a wasteful number, since it uses less digits than its factorization.

66271944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64269 (or 64265 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 66271944 is about 8140.7581956474. The cubic root of 66271944 is about 404.6782874197.

The spelling of 66271944 in words is "sixty-six million, two hundred seventy-one thousand, nine hundred forty-four".