666124560 has 100 divisors (see below), whose sum is σ = 2313571788. Its totient is φ = 177631488.

The previous prime is 666124531. The next prime is 666124601. The reversal of 666124560 is 65421666.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 161493264 + 504631296 = 12708^2 + 22464^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 44919 + ... + 57878.

Almost surely, 2^666124560 is an apocalyptic number.

666124560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

666124560 is an abundant number, since it is smaller than the sum of its proper divisors (1647447228).

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

666124560 is a wasteful number, since it uses less digits than its factorization.

666124560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102822 (or 102807 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 666124560 is about 25809.3889892806. The cubic root of 666124560 is about 873.3436136285.

The spelling of 666124560 in words is "six hundred sixty-six million, one hundred twenty-four thousand, five hundred sixty".