166722339 has 16 divisors (see below), whose sum is σ = 256675328. Its totient is φ = 94286592.

The previous prime is 166722323. The next prime is 166722341. The reversal of 166722339 is 933227661.

It is not a de Polignac number, because 166722339 - 2⁴ = 166722323 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166722297 and 166722306.

It is not an unprimeable number, because it can be changed into a prime (166722319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38887 + ... + 42960.

It is an arithmetic number, because the mean of its divisors is an integer number (16042208).

Almost surely, 2^166722339 is an apocalyptic number.

166722339 is a deficient number, since it is larger than the sum of its proper divisors (89952989).

166722339 is an equidigital number, since it uses as much as digits as its factorization.

166722339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81954.

The product of its digits is 81648, while the sum is 39.

The square root of 166722339 is about 12912.1004875272. The cubic root of 166722339 is about 550.3824766592.

The spelling of 166722339 in words is "one hundred sixty-six million, seven hundred twenty-two thousand, three hundred thirty-nine".