166571097 has 16 divisors (see below), whose sum is σ = 276897792. Its totient is φ = 86530320.

The previous prime is 166571089. The next prime is 166571107. The reversal of 166571097 is 790175661.

It is not a de Polignac number, because 166571097 - 2³ = 166571089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166571017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360313 + ... + 360774.

It is an arithmetic number, because the mean of its divisors is an integer number (17306112).

Almost surely, 2^166571097 is an apocalyptic number.

It is an amenable number.

166571097 is a deficient number, since it is larger than the sum of its proper divisors (110326695).

166571097 is a wasteful number, since it uses less digits than its factorization.

166571097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721108.

The product of its (nonzero) digits is 79380, while the sum is 42.

The square root of 166571097 is about 12906.2425593199. The cubic root of 166571097 is about 550.2160000083.

The spelling of 166571097 in words is "one hundred sixty-six million, five hundred seventy-one thousand, ninety-seven".