166004397 has 20 divisors (see below), whose sum is σ = 267059100. Its totient is φ = 102155904.

The previous prime is 166004393. The next prime is 166004413. The reversal of 166004397 is 793400661.

166004397 is a `hidden beast` number, since 1 + 6 + 600 + 43 + 9 + 7 = 666.

166004397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 32046921 + 133957476 = 5661^2 + 11574^2 .

It is not a de Polignac number, because 166004397 - 2² = 166004393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166004393) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 77772 + ... + 79877.

It is an arithmetic number, because the mean of its divisors is an integer number (13352955).

Almost surely, 2^166004397 is an apocalyptic number.

It is an amenable number.

166004397 is a deficient number, since it is larger than the sum of its proper divisors (101054703).

166004397 is a wasteful number, since it uses less digits than its factorization.

166004397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157674 (or 157665 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 166004397 is about 12884.2693622883. The cubic root of 166004397 is about 549.5913184399.

The spelling of 166004397 in words is "one hundred sixty-six million, four thousand, three hundred ninety-seven".