166503703 has 8 divisors (see below), whose sum is σ = 172475280. Its totient is φ = 160738648.

The previous prime is 166503683. The next prime is 166503719. The reversal of 166503703 is 307305661.

It is not a de Polignac number, because 166503703 - 2⁵ = 166503671 is a prime.

It is a super-2 number, since 2×166503703² = 55446966225424418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166503773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20976 + ... + 27802.

It is an arithmetic number, because the mean of its divisors is an integer number (21559410).

Almost surely, 2^166503703 is an apocalyptic number.

166503703 is a deficient number, since it is larger than the sum of its proper divisors (5971577).

166503703 is an frugal number, since it uses more digits than its factorization.

166503703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6914 (or 6856 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 166503703 is about 12903.6313881016. The cubic root of 166503703 is about 550.1417849336.

The spelling of 166503703 in words is "one hundred sixty-six million, five hundred three thousand, seven hundred three".