165665942 has 16 divisors (see below), whose sum is σ = 271611312. Its totient is φ = 75319200.

The previous prime is 165665917. The next prime is 165665999. The reversal of 165665942 is 249566561.

It is a junction number, because it is equal to n+sod(n) for n = 165665893 and 165665902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45809 + ... + 49292.

It is an arithmetic number, because the mean of its divisors is an integer number (16975707).

Almost surely, 2^165665942 is an apocalyptic number.

165665942 is a deficient number, since it is larger than the sum of its proper divisors (105945370).

165665942 is a wasteful number, since it uses less digits than its factorization.

165665942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95183.

The product of its digits is 388800, while the sum is 44.

The square root of 165665942 is about 12871.1282333757. The cubic root of 165665942 is about 549.2175562744.

The spelling of 165665942 in words is "one hundred sixty-five million, six hundred sixty-five thousand, nine hundred forty-two".