165669343 has 16 divisors (see below), whose sum is σ = 193772800. Its totient is φ = 141582168.

The previous prime is 165669337. The next prime is 165669349. The reversal of 165669343 is 343966561.

It is an interprime number because it is at equal distance from previous prime (165669337) and next prime (165669349).

It is not a de Polignac number, because 165669343 - 2¹³ = 165661151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165669343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165669349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187180 + ... + 188062.

It is an arithmetic number, because the mean of its divisors is an integer number (12110800).

Almost surely, 2^165669343 is an apocalyptic number.

165669343 is a deficient number, since it is larger than the sum of its proper divisors (28103457).

165669343 is an frugal number, since it uses more digits than its factorization.

165669343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1451 (or 1437 counting only the distinct ones).

The product of its digits is 349920, while the sum is 43.

The square root of 165669343 is about 12871.2603500978. The cubic root of 165669343 is about 549.2213145929.

The spelling of 165669343 in words is "one hundred sixty-five million, six hundred sixty-nine thousand, three hundred forty-three".