166723494 has 32 divisors (see below), whose sum is σ = 394225920. Its totient is φ = 45992352.

The previous prime is 166723483. The next prime is 166723541. The reversal of 166723494 is 494327661.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67224 + ... + 69659.

It is an arithmetic number, because the mean of its divisors is an integer number (12319560).

Almost surely, 2^166723494 is an apocalyptic number.

166723494 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

166723494 is an abundant number, since it is smaller than the sum of its proper divisors (227502426).

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

166723494 is a wasteful number, since it uses less digits than its factorization.

166723494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136924.

The product of its digits is 217728, while the sum is 42.

The square root of 166723494 is about 12912.1452129381. The cubic root of 166723494 is about 550.3837476152.

The spelling of 166723494 in words is "one hundred sixty-six million, seven hundred twenty-three thousand, four hundred ninety-four".