166603023 has 12 divisors (see below), whose sum is σ = 241473960. Its totient is φ = 110687856.

The previous prime is 166602983. The next prime is 166603117. The reversal of 166603023 is 320306661.

It is not a de Polignac number, because 166603023 - 2²⁴ = 149825807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166603823) 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, 28953 + ... + 34226.

It is an arithmetic number, because the mean of its divisors is an integer number (20122830).

Almost surely, 2^166603023 is an apocalyptic number.

166603023 is a deficient number, since it is larger than the sum of its proper divisors (74870937).

166603023 is a wasteful number, since it uses less digits than its factorization.

166603023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63478 (or 63475 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 166603023 is about 12907.4793433885. The cubic root of 166603023 is about 550.2511503118.

Adding to 166603023 its reverse (320306661), we get a palindrome (486909684).

It can be divided in two parts, 16660 and 3023, that added together give a 9-th power (19683 = 3⁹).

The spelling of 166603023 in words is "one hundred sixty-six million, six hundred three thousand, twenty-three".