166389797 has 16 divisors (see below), whose sum is σ = 199338240. Its totient is φ = 135793152.

The previous prime is 166389793. The next prime is 166389799. The reversal of 166389797 is 797983661.

166389797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 166389797 - 2² = 166389793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166389793) 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, 34613 + ... + 39125.

It is an arithmetic number, because the mean of its divisors is an integer number (12458640).

Almost surely, 2^166389797 is an apocalyptic number.

It is an amenable number.

166389797 is a deficient number, since it is larger than the sum of its proper divisors (32948443).

166389797 is a wasteful number, since it uses less digits than its factorization.

166389797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4772.

The product of its digits is 3429216, while the sum is 56.

The square root of 166389797 is about 12899.2169142161. The cubic root of 166389797 is about 550.0163047508.

The spelling of 166389797 in words is "one hundred sixty-six million, three hundred eighty-nine thousand, seven hundred ninety-seven".