165496761 has 6 divisors (see below), whose sum is σ = 239050890. Its totient is φ = 110331168.

The previous prime is 165496739. The next prime is 165496763. The reversal of 165496761 is 167694561.

It can be written as a sum of positive squares in only one way, i.e., 147476736 + 18020025 = 12144^2 + 4245^2 .

It is not a de Polignac number, because 165496761 - 2¹¹ = 165494713 is a prime.

It is a super-2 number, since 2×165496761² = 54778355802982242, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (165496763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9194256 + ... + 9194273.

It is an arithmetic number, because the mean of its divisors is an integer number (39841815).

Almost surely, 2^165496761 is an apocalyptic number.

It is an amenable number.

165496761 is a deficient number, since it is larger than the sum of its proper divisors (73554129).

165496761 is a wasteful number, since it uses less digits than its factorization.

165496761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18388535 (or 18388532 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 165496761 is about 12864.5544423427. The cubic root of 165496761 is about 549.0305356919.

The spelling of 165496761 in words is "one hundred sixty-five million, four hundred ninety-six thousand, seven hundred sixty-one".