666015244 has 12 divisors (see below), whose sum is σ = 1197027664. Its totient is φ = 324007344.

The previous prime is 666015223. The next prime is 666015257. The reversal of 666015244 is 442510666.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2249904 + ... + 2250199.

Almost surely, 2^666015244 is an apocalyptic number.

It is an amenable number.

666015244 is a deficient number, since it is larger than the sum of its proper divisors (531012420).

666015244 is a wasteful number, since it uses less digits than its factorization.

666015244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4500144 (or 4500142 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 666015244 is about 25807.2711459387. The cubic root of 666015244 is about 873.2958369517.

It can be divided in two parts, 6660 and 15244, that added together give a square (21904 = 148²).

The spelling of 666015244 in words is "six hundred sixty-six million, fifteen thousand, two hundred forty-four".