66530152 has 16 divisors (see below), whose sum is σ = 134339940. Its totient is φ = 30706176.

The previous prime is 66530141. The next prime is 66530179. The reversal of 66530152 is 25103566.

It can be written as a sum of positive squares in 2 ways, for example, as 66487716 + 42436 = 8154^2 + 206^2 .

It is a super-2 number, since 2×66530152² = 8852522250286208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66530152.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319753 + ... + 319960.

Almost surely, 2^66530152 is an apocalyptic number.

It is an amenable number.

66530152 is an abundant number, since it is smaller than the sum of its proper divisors (67809788).

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

66530152 is a wasteful number, since it uses less digits than its factorization.

66530152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639732 (or 639728 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 66530152 is about 8156.6017433733. The cubic root of 66530152 is about 405.2031739812.

The spelling of 66530152 in words is "sixty-six million, five hundred thirty thousand, one hundred fifty-two".