166716426 has 16 divisors (see below), whose sum is σ = 340527744. Its totient is φ = 54389664.

The previous prime is 166716409. The next prime is 166716427. The reversal of 166716426 is 624617661.

It is not an unprimeable number, because it can be changed into a prime (166716427) 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, 295315 + ... + 295878.

It is an arithmetic number, because the mean of its divisors is an integer number (21282984).

Almost surely, 2^166716426 is an apocalyptic number.

166716426 is an abundant number, since it is smaller than the sum of its proper divisors (173811318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166716426 is a wasteful number, since it uses less digits than its factorization.

166716426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591245.

The product of its digits is 72576, while the sum is 39.

The square root of 166716426 is about 12911.8715142306. The cubic root of 166716426 is about 550.3759699325.

The spelling of 166716426 in words is "one hundred sixty-six million, seven hundred sixteen thousand, four hundred twenty-six".