666412043 has 8 divisors (see below), whose sum is σ = 727206960. Its totient is φ = 605652480.

The previous prime is 666412001. The next prime is 666412049. The reversal of 666412043 is 340214666.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 666412043 - 2⁸ = 666411787 is a prime.

It is a super-2 number, since 2×666412043² = 888210022110867698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666412049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44723 + ... + 57731.

It is an arithmetic number, because the mean of its divisors is an integer number (90900870).

Almost surely, 2^666412043 is an apocalyptic number.

666412043 is a deficient number, since it is larger than the sum of its proper divisors (60794917).

666412043 is a wasteful number, since it uses less digits than its factorization.

666412043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17677.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 666412043 is about 25814.9577377148. The cubic root of 666412043 is about 873.4692334435.

The spelling of 666412043 in words is "six hundred sixty-six million, four hundred twelve thousand, forty-three".