668758117 has 8 divisors (see below), whose sum is σ = 673154496. Its totient is φ = 664374912.

The previous prime is 668758109. The next prime is 668758127. The reversal of 668758117 is 711857866.

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 668758117 - 2³ = 668758109 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 (668758127) 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, 111253 + ... + 117109.

It is an arithmetic number, because the mean of its divisors is an integer number (84144312).

Almost surely, 2^668758117 is an apocalyptic number.

It is an amenable number.

668758117 is a deficient number, since it is larger than the sum of its proper divisors (4396379).

668758117 is a wasteful number, since it uses less digits than its factorization.

668758117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6587.

The product of its digits is 564480, while the sum is 49.

The square root of 668758117 is about 25860.3580214969. The cubic root of 668758117 is about 874.4930361787.

The spelling of 668758117 in words is "six hundred sixty-eight million, seven hundred fifty-eight thousand, one hundred seventeen".