165752901 has 6 divisors (see below), whose sum is σ = 239420870. Its totient is φ = 110501928.

The previous prime is 165752891. The next prime is 165752911. The reversal of 165752901 is 109257561.

It is an interprime number because it is at equal distance from previous prime (165752891) and next prime (165752911).

It can be written as a sum of positive squares in only one way, i.e., 165096801 + 656100 = 12849^2 + 810^2 .

It is not a de Polignac number, because 165752901 - 2⁵ = 165752869 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 (165752911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9208486 + ... + 9208503.

Almost surely, 2^165752901 is an apocalyptic number.

It is an amenable number.

165752901 is a deficient number, since it is larger than the sum of its proper divisors (73667969).

165752901 is a wasteful number, since it uses less digits than its factorization.

165752901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18416995 (or 18416992 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 36.

The square root of 165752901 is about 12874.5058545950. The cubic root of 165752901 is about 549.3136352772.

The spelling of 165752901 in words is "one hundred sixty-five million, seven hundred fifty-two thousand, nine hundred one".