66501072 has 60 divisors (see below), whose sum is σ = 203034624. Its totient is φ = 20151360.

The previous prime is 66501049. The next prime is 66501077. The reversal of 66501072 is 27010566.

66501072 is a `hidden beast` number, since 6 + 650 + 1 + 0 + 7 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66501077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19408 + ... + 22575.

Almost surely, 2^66501072 is an apocalyptic number.

It is an amenable number.

66501072 is an abundant number, since it is smaller than the sum of its proper divisors (136533552).

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

66501072 is a wasteful number, since it uses less digits than its factorization.

66501072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42008 (or 41999 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 66501072 is about 8154.8189434223. The cubic root of 66501072 is about 405.1441279439.

The spelling of 66501072 in words is "sixty-six million, five hundred one thousand, seventy-two".