166745726 has 12 divisors (see below), whose sum is σ = 290954448. Its totient is φ = 71462412.

The previous prime is 166745671. The next prime is 166745749. The reversal of 166745726 is 627547661.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 850646 + ... + 850841.

It is an arithmetic number, because the mean of its divisors is an integer number (24246204).

Almost surely, 2^166745726 is an apocalyptic number.

166745726 is a deficient number, since it is larger than the sum of its proper divisors (124208722).

166745726 is a wasteful number, since it uses less digits than its factorization.

166745726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701503 (or 1701496 counting only the distinct ones).

The product of its digits is 423360, while the sum is 44.

The square root of 166745726 is about 12913.0060791436. The cubic root of 166745726 is about 550.4082104495.

The spelling of 166745726 in words is "one hundred sixty-six million, seven hundred forty-five thousand, seven hundred twenty-six".