66513552 has 40 divisors (see below), whose sum is σ = 196374336. Its totient is φ = 19003776.

The previous prime is 66513533. The next prime is 66513619. The reversal of 66513552 is 25531566.

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, 98643 + ... + 99314.

Almost surely, 2^66513552 is an apocalyptic number.

It is an amenable number.

66513552 is an abundant number, since it is smaller than the sum of its proper divisors (129860784).

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

66513552 is a wasteful number, since it uses less digits than its factorization.

66513552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197975 (or 197969 counting only the distinct ones).

The product of its digits is 27000, while the sum is 33.

The square root of 66513552 is about 8155.5840992537. The cubic root of 66513552 is about 405.1694703045.

The spelling of 66513552 in words is "sixty-six million, five hundred thirteen thousand, five hundred fifty-two".