166694724 has 144 divisors (see below), whose sum is σ = 515144448. Its totient is φ = 44365824.

The previous prime is 166694687. The next prime is 166694753. The reversal of 166694724 is 427496661.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 166694724.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 715312 + ... + 715544.

It is an arithmetic number, because the mean of its divisors is an integer number (3577392).

Almost surely, 2^166694724 is an apocalyptic number.

166694724 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166694724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257572224).

166694724 is an abundant number, since it is smaller than the sum of its proper divisors (348449724).

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

166694724 is a wasteful number, since it uses less digits than its factorization.

166694724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434 (or 429 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 166694724 is about 12911.0310974763. The cubic root of 166694724 is about 550.3520875075.

The spelling of 166694724 in words is "one hundred sixty-six million, six hundred ninety-four thousand, seven hundred twenty-four".