666012117 has 4 divisors (see below), whose sum is σ = 888016160. Its totient is φ = 444008076.

The previous prime is 666012101. The next prime is 666012143. The reversal of 666012117 is 711210666.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 666012117 - 2⁴ = 666012101 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 (666012157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111002017 + ... + 111002022.

It is an arithmetic number, because the mean of its divisors is an integer number (222004040).

Almost surely, 2^666012117 is an apocalyptic number.

It is an amenable number.

666012117 is a deficient number, since it is larger than the sum of its proper divisors (222004043).

666012117 is a wasteful number, since it uses less digits than its factorization.

666012117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222004042.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 666012117 is about 25807.2105621665. The cubic root of 666012117 is about 873.2944702161.

The spelling of 666012117 in words is "six hundred sixty-six million, twelve thousand, one hundred seventeen".