166495903 has 6 divisors (see below), whose sum is σ = 190320056. Its totient is φ = 142681512.

The previous prime is 166495877. The next prime is 166495913. The reversal of 166495903 is 309594661.

It is not a de Polignac number, because 166495903 - 2⁹ = 166495391 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 166495903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166495913) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31701 + ... + 36577.

Almost surely, 2^166495903 is an apocalyptic number.

166495903 is a deficient number, since it is larger than the sum of its proper divisors (23824153).

166495903 is an frugal number, since it uses more digits than its factorization.

166495903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9761 (or 4884 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 166495903 is about 12903.3291440620. The cubic root of 166495903 is about 550.1331941879.

The spelling of 166495903 in words is "one hundred sixty-six million, four hundred ninety-five thousand, nine hundred three".