666746117 has 8 divisors (see below), whose sum is σ = 671529600. Its totient is φ = 661977360.

The previous prime is 666746111. The next prime is 666746153. The reversal of 666746117 is 711647666.

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 666746117 - 2²⁴ = 649968901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666746111) 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, 96767 + ... + 103427.

It is an arithmetic number, because the mean of its divisors is an integer number (83941200).

Almost surely, 2^666746117 is an apocalyptic number.

It is an amenable number.

666746117 is a deficient number, since it is larger than the sum of its proper divisors (4783483).

666746117 is a wasteful number, since it uses less digits than its factorization.

666746117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7363.

The product of its digits is 254016, while the sum is 44.

The square root of 666746117 is about 25821.4274779688. The cubic root of 666746117 is about 873.6151664874.

The spelling of 666746117 in words is "six hundred sixty-six million, seven hundred forty-six thousand, one hundred seventeen".