66013572 has 24 divisors (see below), whose sum is σ = 154268800. Its totient is φ = 21970656.

The previous prime is 66013553. The next prime is 66013579. The reversal of 66013572 is 27531066.

It is not an unprimeable number, because it can be changed into a prime (66013579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4629 + ... + 12387.

Almost surely, 2^66013572 is an apocalyptic number.

It is an amenable number.

66013572 is an abundant number, since it is smaller than the sum of its proper divisors (88255228).

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

66013572 is a wasteful number, since it uses less digits than its factorization.

66013572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8475 (or 8473 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 66013572 is about 8124.8736605562. The cubic root of 66013572 is about 404.1517010271.

The spelling of 66013572 in words is "sixty-six million, thirteen thousand, five hundred seventy-two".