165722701 has 2 divisors, whose sum is σ = 165722702. Its totient is φ = 165722700.

The previous prime is 165722699. The next prime is 165722707. The reversal of 165722701 is 107227561.

165722701 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142778601 + 22944100 = 11949^2 + 4790^2 .

It is a cyclic number.

It is not a de Polignac number, because 165722701 - 2¹ = 165722699 is a prime.

Together with 165722699, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165722707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82861350 + 82861351.

It is an arithmetic number, because the mean of its divisors is an integer number (82861351).

Almost surely, 2^165722701 is an apocalyptic number.

It is an amenable number.

165722701 is a deficient number, since it is larger than the sum of its proper divisors (1).

165722701 is an equidigital number, since it uses as much as digits as its factorization.

165722701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 165722701 is about 12873.3329406180. The cubic root of 165722701 is about 549.2802718000.

The spelling of 165722701 in words is "one hundred sixty-five million, seven hundred twenty-two thousand, seven hundred one".