166380097 has 4 divisors (see below), whose sum is σ = 179178580. Its totient is φ = 153581616.

The previous prime is 166380079. The next prime is 166380101. The reversal of 166380097 is 790083661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52403121 + 113976976 = 7239^2 + 10676^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166380097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166380997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6399222 + ... + 6399247.

It is an arithmetic number, because the mean of its divisors is an integer number (44794645).

Almost surely, 2^166380097 is an apocalyptic number.

It is an amenable number.

166380097 is a deficient number, since it is larger than the sum of its proper divisors (12798483).

166380097 is a wasteful number, since it uses less digits than its factorization.

166380097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12798482.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 166380097 is about 12898.8409169196. The cubic root of 166380097 is about 550.0056164716.

The spelling of 166380097 in words is "one hundred sixty-six million, three hundred eighty thousand, ninety-seven".