166198597 has 2 divisors, whose sum is σ = 166198598. Its totient is φ = 166198596.

The previous prime is 166198583. The next prime is 166198607. The reversal of 166198597 is 795891661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125417601 + 40780996 = 11199^2 + 6386^2 .

It is an emirp because it is prime and its reverse (795891661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 166198597 - 2⁷ = 166198469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166198517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83099298 + 83099299.

It is an arithmetic number, because the mean of its divisors is an integer number (83099299).

Almost surely, 2^166198597 is an apocalyptic number.

It is an amenable number.

166198597 is a deficient number, since it is larger than the sum of its proper divisors (1).

166198597 is an equidigital number, since it uses as much as digits as its factorization.

166198597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 52.

The square root of 166198597 is about 12891.8034812822. The cubic root of 166198597 is about 549.8055477886.

The spelling of 166198597 in words is "one hundred sixty-six million, one hundred ninety-eight thousand, five hundred ninety-seven".