66564272 has 40 divisors (see below), whose sum is σ = 132580800. Its totient is φ = 32363072.

The previous prime is 66564269. The next prime is 66564293. The reversal of 66564272 is 27246566.

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, 100679 + ... + 101337.

It is an arithmetic number, because the mean of its divisors is an integer number (3314520).

Almost surely, 2^66564272 is an apocalyptic number.

It is an amenable number.

66564272 is a deficient number, since it is larger than the sum of its proper divisors (66016528).

66564272 is a wasteful number, since it uses less digits than its factorization.

66564272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833 (or 827 counting only the distinct ones).

The product of its digits is 120960, while the sum is 38.

The square root of 66564272 is about 8158.6930325880. The cubic root of 66564272 is about 405.2724316490.

The spelling of 66564272 in words is "sixty-six million, five hundred sixty-four thousand, two hundred seventy-two".