166499901 has 16 divisors (see below), whose sum is σ = 248328000. Its totient is φ = 110252304.

The previous prime is 166499881. The next prime is 166499923. The reversal of 166499901 is 109994661.

It is not a de Polignac number, because 166499901 - 2²² = 162305597 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166494901) 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, 16671 + ... + 24716.

It is an arithmetic number, because the mean of its divisors is an integer number (15520500).

Almost surely, 2^166499901 is an apocalyptic number.

It is an amenable number.

166499901 is a deficient number, since it is larger than the sum of its proper divisors (81828099).

166499901 is a wasteful number, since it uses less digits than its factorization.

166499901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41545 (or 41539 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 166499901 is about 12903.4840643913. The cubic root of 166499901 is about 550.1375975293.

The spelling of 166499901 in words is "one hundred sixty-six million, four hundred ninety-nine thousand, nine hundred one".