166502501 has 4 divisors (see below), whose sum is σ = 181639104. Its totient is φ = 151365900.

The previous prime is 166502477. The next prime is 166502513. The reversal of 166502501 is 105205661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166502501 - 2¹⁰ = 166501477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166502551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7568285 + ... + 7568306.

It is an arithmetic number, because the mean of its divisors is an integer number (45409776).

Almost surely, 2^166502501 is an apocalyptic number.

166502501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

166502501 is a deficient number, since it is larger than the sum of its proper divisors (15136603).

166502501 is a wasteful number, since it uses less digits than its factorization.

166502501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15136602.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 166502501 is about 12903.5848119815. The cubic root of 166502501 is about 550.1404610952.

The spelling of 166502501 in words is "one hundred sixty-six million, five hundred two thousand, five hundred one".