66512052 has 36 divisors (see below), whose sum is σ = 170437540. Its totient is φ = 21866112.

The previous prime is 66512029. The next prime is 66512063. The reversal of 66512052 is 25021566.

66512052 is a `hidden beast` number, since 6 + 651 + 2 + 0 + 5 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 39012516 + 27499536 = 6246^2 + 5244^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×66512052² = 8847706122501408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10027 + ... + 15282.

Almost surely, 2^66512052 is an apocalyptic number.

It is an amenable number.

66512052 is an abundant number, since it is smaller than the sum of its proper divisors (103925488).

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

66512052 is a wasteful number, since it uses less digits than its factorization.

66512052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25392 (or 25387 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 66512052 is about 8155.4921372042. The cubic root of 66512052 is about 405.1664245153.

The spelling of 66512052 in words is "sixty-six million, five hundred twelve thousand, fifty-two".