667952117 has 24 divisors (see below), whose sum is σ = 822209856. Its totient is φ = 531353088.

The previous prime is 667952113. The next prime is 667952119. The reversal of 667952117 is 711259766.

It is not a de Polignac number, because 667952117 - 2² = 667952113 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 (667952113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145418 + ... + 149940.

It is an arithmetic number, because the mean of its divisors is an integer number (34258744).

Almost surely, 2^667952117 is an apocalyptic number.

It is an amenable number.

667952117 is a deficient number, since it is larger than the sum of its proper divisors (154257739).

667952117 is a wasteful number, since it uses less digits than its factorization.

667952117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4637 (or 4620 counting only the distinct ones).

The product of its digits is 158760, while the sum is 44.

The square root of 667952117 is about 25844.7696255935. The cubic root of 667952117 is about 874.1415763999.

The spelling of 667952117 in words is "six hundred sixty-seven million, nine hundred fifty-two thousand, one hundred seventeen".