166597039 has 8 divisors (see below), whose sum is σ = 193518368. Its totient is φ = 140456160.

The previous prime is 166597033. The next prime is 166597091. The reversal of 166597039 is 930795661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 166597039 - 2³ = 166597031 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166597039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166597031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194652 + ... + 195505.

It is an arithmetic number, because the mean of its divisors is an integer number (24189796).

Almost surely, 2^166597039 is an apocalyptic number.

166597039 is a deficient number, since it is larger than the sum of its proper divisors (26921329).

166597039 is an equidigital number, since it uses as much as digits as its factorization.

166597039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390225.

The product of its (nonzero) digits is 306180, while the sum is 46.

The square root of 166597039 is about 12907.2475377208. The cubic root of 166597039 is about 550.2445623115.

The spelling of 166597039 in words is "one hundred sixty-six million, five hundred ninety-seven thousand, thirty-nine".