166694140 has 12 divisors (see below), whose sum is σ = 350057736. Its totient is φ = 66677648.

The previous prime is 166694119. The next prime is 166694153. The reversal of 166694140 is 41496661.

It is a self number, because there is not a number n which added to its sum of digits gives 166694140.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4167334 + ... + 4167373.

It is an arithmetic number, because the mean of its divisors is an integer number (29171478).

Almost surely, 2^166694140 is an apocalyptic number.

166694140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166694140 is an abundant number, since it is smaller than the sum of its proper divisors (183363596).

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

166694140 is a wasteful number, since it uses less digits than its factorization.

166694140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8334716 (or 8334714 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 166694140 is about 12911.0084811373. The cubic root of 166694140 is about 550.3514448037.

The spelling of 166694140 in words is "one hundred sixty-six million, six hundred ninety-four thousand, one hundred forty".