252278666 has 8 divisors (see below), whose sum is σ = 382977504. Its totient is φ = 124619500.

The previous prime is 252278659. The next prime is 252278669. The reversal of 252278666 is 666872252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (252278669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 759710 + ... + 760041.

It is an arithmetic number, because the mean of its divisors is an integer number (47872188).

Almost surely, 2^252278666 is an apocalyptic number.

252278666 is a deficient number, since it is larger than the sum of its proper divisors (130698838).

252278666 is a wasteful number, since it uses less digits than its factorization.

252278666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519836.

The product of its digits is 483840, while the sum is 44.

The square root of 252278666 is about 15883.2825952320. The cubic root of 252278666 is about 631.8686986887.

It can be divided in two parts, 2522786 and 66, that multiplied together give a triangular number (166503876 = T₁₈₂₄₈).

The spelling of 252278666 in words is "two hundred fifty-two million, two hundred seventy-eight thousand, six hundred sixty-six".