166123697 has 2 divisors, whose sum is σ = 166123698. Its totient is φ = 166123696.

The previous prime is 166123667. The next prime is 166123703. The reversal of 166123697 is 796321661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116618401 + 49505296 = 10799^2 + 7036^2 .

It is a cyclic number.

It is not a de Polignac number, because 166123697 - 2¹⁰ = 166122673 is a prime.

It is not a weakly prime, because it can be changed into another prime (166123667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83061848 + 83061849.

It is an arithmetic number, because the mean of its divisors is an integer number (83061849).

Almost surely, 2^166123697 is an apocalyptic number.

It is an amenable number.

166123697 is a deficient number, since it is larger than the sum of its proper divisors (1).

166123697 is an equidigital number, since it uses as much as digits as its factorization.

166123697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 41.

The square root of 166123697 is about 12888.8982073721. The cubic root of 166123697 is about 549.7229425520.

The spelling of 166123697 in words is "one hundred sixty-six million, one hundred twenty-three thousand, six hundred ninety-seven".