166634137 has 2 divisors, whose sum is σ = 166634138. Its totient is φ = 166634136.

The previous prime is 166634071. The next prime is 166634141. The reversal of 166634137 is 731436661.

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., 160503561 + 6130576 = 12669^2 + 2476^2 .

It is a cyclic number.

It is not a de Polignac number, because 166634137 - 2¹⁹ = 166109849 is a prime.

It is a super-2 number, since 2×166634137² = 55533871227469538, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166634096 and 166634105.

It is not a weakly prime, because it can be changed into another prime (166634177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83317068 + 83317069.

It is an arithmetic number, because the mean of its divisors is an integer number (83317069).

Almost surely, 2^166634137 is an apocalyptic number.

It is an amenable number.

166634137 is a deficient number, since it is larger than the sum of its proper divisors (1).

166634137 is an equidigital number, since it uses as much as digits as its factorization.

166634137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 37.

The square root of 166634137 is about 12908.6845573048. The cubic root of 166634137 is about 550.2854022886.

The spelling of 166634137 in words is "one hundred sixty-six million, six hundred thirty-four thousand, one hundred thirty-seven".