166268493 has 12 divisors (see below), whose sum is σ = 244103548. Its totient is φ = 109028160.

The previous prime is 166268447. The next prime is 166268497. The reversal of 166268493 is 394862661.

166268493 is a `hidden beast` number, since 16 + 626 + 8 + 4 + 9 + 3 = 666.

166268493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 33143049 + 133125444 = 5757^2 + 11538^2 .

It is not a de Polignac number, because 166268493 - 2⁶ = 166268429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166268497) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 150880 + ... + 151977.

Almost surely, 2^166268493 is an apocalyptic number.

It is an amenable number.

166268493 is a deficient number, since it is larger than the sum of its proper divisors (77835055).

166268493 is a wasteful number, since it uses less digits than its factorization.

166268493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302924 (or 302921 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 166268493 is about 12894.5140660670. The cubic root of 166268493 is about 549.8826118619.

The spelling of 166268493 in words is "one hundred sixty-six million, two hundred sixty-eight thousand, four hundred ninety-three".