166994398 has 16 divisors (see below), whose sum is σ = 262020096. Its totient is φ = 79672120.

The previous prime is 166994389. The next prime is 166994407. The reversal of 166994398 is 893499661.

It is an interprime number because it is at equal distance from previous prime (166994389) and next prime (166994407).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15615 + ... + 24037.

It is an arithmetic number, because the mean of its divisors is an integer number (16376256).

Almost surely, 2^166994398 is an apocalyptic number.

166994398 is a deficient number, since it is larger than the sum of its proper divisors (95025698).

166994398 is a wasteful number, since it uses less digits than its factorization.

166994398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8879.

The product of its digits is 2519424, while the sum is 55.

The square root of 166994398 is about 12922.6312336149. The cubic root of 166994398 is about 550.6816869785.

The spelling of 166994398 in words is "one hundred sixty-six million, nine hundred ninety-four thousand, three hundred ninety-eight".