166849503 has 16 divisors (see below), whose sum is σ = 230858496. Its totient is φ = 107110080.

The previous prime is 166849453. The next prime is 166849511. The reversal of 166849503 is 305948661.

It is not a de Polignac number, because 166849503 - 2¹⁴ = 166833119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166849523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51 + ... + 18267.

It is an arithmetic number, because the mean of its divisors is an integer number (14428656).

Almost surely, 2^166849503 is an apocalyptic number.

166849503 is a deficient number, since it is larger than the sum of its proper divisors (64008993).

166849503 is a wasteful number, since it uses less digits than its factorization.

166849503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18334.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 166849503 is about 12917.0237671067. The cubic root of 166849503 is about 550.5223720306.

The spelling of 166849503 in words is "one hundred sixty-six million, eight hundred forty-nine thousand, five hundred three".