666756113 has 8 divisors (see below), whose sum is σ = 702184320. Its totient is φ = 631361520.

The previous prime is 666756073. The next prime is 666756127. The reversal of 666756113 is 311657666.

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 666756113 - 2⁸ = 666755857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666756163) 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, 39323 + ... + 53663.

It is an arithmetic number, because the mean of its divisors is an integer number (87773040).

Almost surely, 2^666756113 is an apocalyptic number.

It is an amenable number.

666756113 is a deficient number, since it is larger than the sum of its proper divisors (35428207).

666756113 is a wasteful number, since it uses less digits than its factorization.

666756113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16807.

The product of its digits is 136080, while the sum is 41.

The square root of 666756113 is about 25821.6210374175. The cubic root of 666756113 is about 873.6195322738.

The spelling of 666756113 in words is "six hundred sixty-six million, seven hundred fifty-six thousand, one hundred thirteen".