66513452 has 24 divisors (see below), whose sum is σ = 129734640. Its totient is φ = 29652480.

The previous prime is 66513373. The next prime is 66513479. The reversal of 66513452 is 25431566.

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, 24449 + ... + 27032.

It is an arithmetic number, because the mean of its divisors is an integer number (5405610).

Almost surely, 2^66513452 is an apocalyptic number.

It is an amenable number.

66513452 is a deficient number, since it is larger than the sum of its proper divisors (63221188).

66513452 is a wasteful number, since it uses less digits than its factorization.

66513452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51521 (or 51519 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 66513452 is about 8155.5779684827. The cubic root of 66513452 is about 405.1692672534.

The spelling of 66513452 in words is "sixty-six million, five hundred thirteen thousand, four hundred fifty-two".