666274333815 has 24 divisors (see below), whose sum is σ = 1156438324080. Its totient is φ = 354865446144.

The previous prime is 666274333789. The next prime is 666274333861. The reversal of 666274333815 is 518333472666.

It is not a de Polignac number, because 666274333815 - 2¹⁶ = 666274268279 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9984402 + ... + 10050911.

It is an arithmetic number, because the mean of its divisors is an integer number (48184930170).

Almost surely, 2^666274333815 is an apocalyptic number.

666274333815 is a deficient number, since it is larger than the sum of its proper divisors (490163990265).

666274333815 is a wasteful number, since it uses less digits than its factorization.

666274333815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20036063 (or 20036060 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 54.

The spelling of 666274333815 in words is "six hundred sixty-six billion, two hundred seventy-four million, three hundred thirty-three thousand, eight hundred fifteen".