166313032157 has 2 divisors, whose sum is σ = 166313032158. Its totient is φ = 166313032156.

The previous prime is 166313032153. The next prime is 166313032201. The reversal of 166313032157 is 751230313661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142849226116 + 23463806041 = 377954^2 + 153179^2 .

It is a cyclic number.

It is not a de Polignac number, because 166313032157 - 2² = 166313032153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166313032157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166313032153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83156516078 + 83156516079.

It is an arithmetic number, because the mean of its divisors is an integer number (83156516079).

Almost surely, 2^166313032157 is an apocalyptic number.

It is an amenable number.

166313032157 is a deficient number, since it is larger than the sum of its proper divisors (1).

166313032157 is an equidigital number, since it uses as much as digits as its factorization.

166313032157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 38.

The spelling of 166313032157 in words is "one hundred sixty-six billion, three hundred thirteen million, thirty-two thousand, one hundred fifty-seven".