166174157 has 2 divisors, whose sum is σ = 166174158. Its totient is φ = 166174156.

The previous prime is 166174121. The next prime is 166174159. The reversal of 166174157 is 751471661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165739876 + 434281 = 12874^2 + 659^2 .

It is a cyclic number.

It is not a de Polignac number, because 166174157 - 2¹² = 166170061 is a prime.

It is a super-2 number, since 2×166174157² = 55227700909321298, which contains 22 as substring.

Together with 166174159, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166174157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166174159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83087078 + 83087079.

It is an arithmetic number, because the mean of its divisors is an integer number (83087079).

Almost surely, 2^166174157 is an apocalyptic number.

It is an amenable number.

166174157 is a deficient number, since it is larger than the sum of its proper divisors (1).

166174157 is an equidigital number, since it uses as much as digits as its factorization.

166174157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 38.

The square root of 166174157 is about 12890.8555573321. The cubic root of 166174157 is about 549.7785962849.

The spelling of 166174157 in words is "one hundred sixty-six million, one hundred seventy-four thousand, one hundred fifty-seven".