252180666 has 12 divisors (see below), whose sum is σ = 546391482. Its totient is φ = 84060216.

The previous prime is 252180661. The next prime is 252180667. The reversal of 252180666 is 666081252.

It can be written as a sum of positive squares in only one way, i.e., 252142641 + 38025 = 15879^2 + 195^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 252180666.

It is not an unprimeable number, because it can be changed into a prime (252180661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7005001 + ... + 7005036.

Almost surely, 2^252180666 is an apocalyptic number.

252180666 is an abundant number, since it is smaller than the sum of its proper divisors (294210816).

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

252180666 is a wasteful number, since it uses less digits than its factorization.

252180666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14010045 (or 14010042 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 252180666 is about 15880.1972909659. The cubic root of 252180666 is about 631.7868696629.

The spelling of 252180666 in words is "two hundred fifty-two million, one hundred eighty thousand, six hundred sixty-six".