666411712 has 28 divisors (see below), whose sum is σ = 1365073216. Its totient is φ = 322456320.

The previous prime is 666411709. The next prime is 666411727. The reversal of 666411712 is 217114666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165963 + ... + 169930.

Almost surely, 2^666411712 is an apocalyptic number.

666411712 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

666411712 is an abundant number, since it is smaller than the sum of its proper divisors (698661504).

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

666411712 is a wasteful number, since it uses less digits than its factorization.

666411712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335936 (or 335926 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 666411712 is about 25814.9513267021. The cubic root of 666411712 is about 873.4690888291.

The spelling of 666411712 in words is "six hundred sixty-six million, four hundred eleven thousand, seven hundred twelve".