666163250 has 32 divisors (see below), whose sum is σ = 1258146864. Its totient is φ = 264096000.

The previous prime is 666163243. The next prime is 666163301. The reversal of 666163250 is 52361666.

666163250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 45306361 + 620856889 = 6731^2 + 24917^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 666163250.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16460 + ... + 40040.

Almost surely, 2^666163250 is an apocalyptic number.

666163250 is a deficient number, since it is larger than the sum of its proper divisors (591983614).

666163250 is a wasteful number, since it uses less digits than its factorization.

666163250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23711 (or 23701 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 666163250 is about 25810.1385118329. The cubic root of 666163250 is about 873.3605218827.

The spelling of 666163250 in words is "six hundred sixty-six million, one hundred sixty-three thousand, two hundred fifty".