166497723 has 12 divisors (see below), whose sum is σ = 274853488. Its totient is φ = 95141520.

The previous prime is 166497701. The next prime is 166497733. The reversal of 166497723 is 327794661.

It is not a de Polignac number, because 166497723 - 2¹⁰ = 166496699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166497733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1321348 + ... + 1321473.

Almost surely, 2^166497723 is an apocalyptic number.

166497723 is a deficient number, since it is larger than the sum of its proper divisors (108355765).

166497723 is a wasteful number, since it uses less digits than its factorization.

166497723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2642834 (or 2642831 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 166497723 is about 12903.3996683045. The cubic root of 166497723 is about 550.1351987192.

The spelling of 166497723 in words is "one hundred sixty-six million, four hundred ninety-seven thousand, seven hundred twenty-three".