165669497 has 16 divisors (see below), whose sum is σ = 194304000. Its totient is φ = 138296592.

The previous prime is 165669443. The next prime is 165669503. The reversal of 165669497 is 794966561.

It is a de Polignac number, because none of the positive numbers 2^k-165669497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165639497) 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, 149648 + ... + 150750.

It is an arithmetic number, because the mean of its divisors is an integer number (12144000).

Almost surely, 2^165669497 is an apocalyptic number.

It is an amenable number.

165669497 is a deficient number, since it is larger than the sum of its proper divisors (28634503).

165669497 is a wasteful number, since it uses less digits than its factorization.

165669497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1652.

The product of its digits is 2449440, while the sum is 53.

The square root of 165669497 is about 12871.2663324166. The cubic root of 165669497 is about 549.2214847714.

The spelling of 165669497 in words is "one hundred sixty-five million, six hundred sixty-nine thousand, four hundred ninety-seven".