207666157 has 2 divisors, whose sum is σ = 207666158. Its totient is φ = 207666156.

The previous prime is 207666119. The next prime is 207666167. The reversal of 207666157 is 751666702.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177129481 + 30536676 = 13309^2 + 5526^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-207666157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (207666167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103833078 + 103833079.

It is an arithmetic number, because the mean of its divisors is an integer number (103833079).

Almost surely, 2^207666157 is an apocalyptic number.

It is an amenable number.

207666157 is a deficient number, since it is larger than the sum of its proper divisors (1).

207666157 is an equidigital number, since it uses as much as digits as its factorization.

207666157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 207666157 is about 14410.6265304462. The cubic root of 207666157 is about 592.1820540111.

The spelling of 207666157 in words is "two hundred seven million, six hundred sixty-six thousand, one hundred fifty-seven".