666364056 has 16 divisors (see below), whose sum is σ = 1665910200. Its totient is φ = 222121344.

The previous prime is 666364031. The next prime is 666364081. The reversal of 666364056 is 650463666.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (666364031) and next prime (666364081).

It is a super-2 number, since 2×666364056² = 888082110257542272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 666363999 and 666364017.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13882561 + ... + 13882608.

Almost surely, 2^666364056 is an apocalyptic number.

It is an amenable number.

666364056 is an abundant number, since it is smaller than the sum of its proper divisors (999546144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

666364056 is a wasteful number, since it uses less digits than its factorization.

666364056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27765178 (or 27765174 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 42.

The square root of 666364056 is about 25814.0282792128. The cubic root of 666364056 is about 873.4482673487.

The spelling of 666364056 in words is "six hundred sixty-six million, three hundred sixty-four thousand, fifty-six".