66210572 has 24 divisors (see below), whose sum is σ = 119081760. Its totient is φ = 32192640.

The previous prime is 66210533. The next prime is 66210577. The reversal of 66210572 is 27501266.

66210572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66210577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79454 + ... + 80282.

It is an arithmetic number, because the mean of its divisors is an integer number (4961740).

Almost surely, 2^66210572 is an apocalyptic number.

It is an amenable number.

66210572 is a deficient number, since it is larger than the sum of its proper divisors (52871188).

66210572 is a wasteful number, since it uses less digits than its factorization.

66210572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1361 (or 1359 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 66210572 is about 8136.9878947925. The cubic root of 66210572 is about 404.5533296329.

The spelling of 66210572 in words is "sixty-six million, two hundred ten thousand, five hundred seventy-two".