166416503 has 12 divisors (see below), whose sum is σ = 184274160. Its totient is φ = 150168480.

The previous prime is 166416487. The next prime is 166416511. The reversal of 166416503 is 305614661.

It is not a de Polignac number, because 166416503 - 2⁴ = 166416487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 166416503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166416533) 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, 11558 + ... + 21596.

It is an arithmetic number, because the mean of its divisors is an integer number (15356180).

Almost surely, 2^166416503 is an apocalyptic number.

166416503 is a deficient number, since it is larger than the sum of its proper divisors (17857657).

166416503 is a wasteful number, since it uses less digits than its factorization.

166416503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10198 (or 10187 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 166416503 is about 12900.2520518012. The cubic root of 166416503 is about 550.0457295311.

The spelling of 166416503 in words is "one hundred sixty-six million, four hundred sixteen thousand, five hundred three".