252515666 has 16 divisors (see below), whose sum is σ = 425646144. Its totient is φ = 111478224.

The previous prime is 252515663. The next prime is 252515701. The reversal of 252515666 is 666515252.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (252515663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210536 + ... + 211731.

It is an arithmetic number, because the mean of its divisors is an integer number (26602884).

Almost surely, 2^252515666 is an apocalyptic number.

252515666 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

252515666 is a deficient number, since it is larger than the sum of its proper divisors (173130478).

252515666 is a wasteful number, since it uses less digits than its factorization.

252515666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422305.

The product of its digits is 108000, while the sum is 38.

The square root of 252515666 is about 15890.7415182552. The cubic root of 252515666 is about 632.0665037772.

The spelling of 252515666 in words is "two hundred fifty-two million, five hundred fifteen thousand, six hundred sixty-six".