166498451 has 16 divisors (see below), whose sum is σ = 195385344. Its totient is φ = 138910464.

The previous prime is 166498447. The next prime is 166498471. The reversal of 166498451 is 154894661.

It is not a de Polignac number, because 166498451 - 2² = 166498447 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (166498421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105470 + ... + 107036.

It is an arithmetic number, because the mean of its divisors is an integer number (12211584).

Almost surely, 2^166498451 is an apocalyptic number.

166498451 is a deficient number, since it is larger than the sum of its proper divisors (28886893).

166498451 is a wasteful number, since it uses less digits than its factorization.

166498451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970.

The product of its digits is 207360, while the sum is 44.

The square root of 166498451 is about 12903.4278778935. The cubic root of 166498451 is about 550.1360005277.

The spelling of 166498451 in words is "one hundred sixty-six million, four hundred ninety-eight thousand, four hundred fifty-one".