165678942 has 64 divisors (see below), whose sum is σ = 401909760. Its totient is φ = 44841600.

The previous prime is 165678941. The next prime is 165678971. The reversal of 165678942 is 249876561.

165678942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 165678891 and 165678900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165678941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23484 + ... + 29712.

It is an arithmetic number, because the mean of its divisors is an integer number (6279840).

Almost surely, 2^165678942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165678942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200954880).

165678942 is an abundant number, since it is smaller than the sum of its proper divisors (236230818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165678942 is a wasteful number, since it uses less digits than its factorization.

165678942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6289.

The product of its digits is 725760, while the sum is 48.

The square root of 165678942 is about 12871.6332297032. The cubic root of 165678942 is about 549.2319218131.

The spelling of 165678942 in words is "one hundred sixty-five million, six hundred seventy-eight thousand, nine hundred forty-two".