252630666 has 24 divisors (see below), whose sum is σ = 571165920. Its totient is φ = 80548776.

The previous prime is 252630661. The next prime is 252630667. The reversal of 252630666 is 666036252.

252630666 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 252630666.

It is not an unprimeable number, because it can be changed into a prime (252630661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 304696 + ... + 305523.

It is an arithmetic number, because the mean of its divisors is an integer number (23798580).

Almost surely, 2^252630666 is an apocalyptic number.

252630666 is an abundant number, since it is smaller than the sum of its proper divisors (318535254).

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

252630666 is a wasteful number, since it uses less digits than its factorization.

252630666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610250 (or 610247 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 252630666 is about 15894.3595655817. The cubic root of 252630666 is about 632.1624405528.

The spelling of 252630666 in words is "two hundred fifty-two million, six hundred thirty thousand, six hundred sixty-six".