156668117 has 2 divisors, whose sum is σ = 156668118. Its totient is φ = 156668116.

The previous prime is 156668051. The next prime is 156668143. The reversal of 156668117 is 711866651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150160516 + 6507601 = 12254^2 + 2551^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156668117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156668417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78334058 + 78334059.

It is an arithmetic number, because the mean of its divisors is an integer number (78334059).

Almost surely, 2^156668117 is an apocalyptic number.

It is an amenable number.

156668117 is a deficient number, since it is larger than the sum of its proper divisors (1).

156668117 is an equidigital number, since it uses as much as digits as its factorization.

156668117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 41.

The square root of 156668117 is about 12516.7135063482. The cubic root of 156668117 is about 539.0886743524.

The spelling of 156668117 in words is "one hundred fifty-six million, six hundred sixty-eight thousand, one hundred seventeen".