166382015 has 4 divisors (see below), whose sum is σ = 199658424. Its totient is φ = 133105608.

The previous prime is 166381997. The next prime is 166382017. The reversal of 166382015 is 510283661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166382015 - 2⁶ = 166381951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166382017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16638197 + ... + 16638206.

It is an arithmetic number, because the mean of its divisors is an integer number (49914606).

Almost surely, 2^166382015 is an apocalyptic number.

166382015 is a deficient number, since it is larger than the sum of its proper divisors (33276409).

166382015 is an equidigital number, since it uses as much as digits as its factorization.

166382015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33276408.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 166382015 is about 12898.9152644709. The cubic root of 166382015 is about 550.0077299189.

The spelling of 166382015 in words is "one hundred sixty-six million, three hundred eighty-two thousand, fifteen".