166455998 has 16 divisors (see below), whose sum is σ = 271890000. Its totient is φ = 76128192.

The previous prime is 166455997. The next prime is 166456033. The reversal of 166455998 is 899554661.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166455997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74423 + ... + 76626.

It is an arithmetic number, because the mean of its divisors is an integer number (16993125).

Almost surely, 2^166455998 is an apocalyptic number.

166455998 is a deficient number, since it is larger than the sum of its proper divisors (105434002).

166455998 is a wasteful number, since it uses less digits than its factorization.

166455998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151099.

The product of its digits is 2332800, while the sum is 53.

The square root of 166455998 is about 12901.7827450318. The cubic root of 166455998 is about 550.0892395143.

The spelling of 166455998 in words is "one hundred sixty-six million, four hundred fifty-five thousand, nine hundred ninety-eight".