666313427 has 48 divisors (see below), whose sum is σ = 799098048. Its totient is φ = 553512960.

The previous prime is 666313421. The next prime is 666313433. The reversal of 666313427 is 724313666.

It is an interprime number because it is at equal distance from previous prime (666313421) and next prime (666313433).

It is not a de Polignac number, because 666313427 - 2⁸ = 666313171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666313421) 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 47 ways as a sum of consecutive naturals, for example, 5896523 + ... + 5896635.

It is an arithmetic number, because the mean of its divisors is an integer number (16647876).

Almost surely, 2^666313427 is an apocalyptic number.

666313427 is a deficient number, since it is larger than the sum of its proper divisors (132784621).

666313427 is a wasteful number, since it uses less digits than its factorization.

666313427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 227 counting only the distinct ones).

The product of its digits is 108864, while the sum is 38.

The square root of 666313427 is about 25813.0476116246. The cubic root of 666313427 is about 873.4261458412.

The spelling of 666313427 in words is "six hundred sixty-six million, three hundred thirteen thousand, four hundred twenty-seven".