165166544 has 20 divisors (see below), whose sum is σ = 336853440. Its totient is φ = 78236640.

The previous prime is 165166541. The next prime is 165166553. The reversal of 165166544 is 445661561.

It is a happy number.

165166544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 165166498 and 165166507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165166541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271352 + ... + 271959.

It is an arithmetic number, because the mean of its divisors is an integer number (16842672).

Almost surely, 2^165166544 is an apocalyptic number.

It is an amenable number.

165166544 is an abundant number, since it is smaller than the sum of its proper divisors (171686896).

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

165166544 is a wasteful number, since it uses less digits than its factorization.

165166544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543338 (or 543332 counting only the distinct ones).

The product of its digits is 86400, while the sum is 38.

The square root of 165166544 is about 12851.7136600533. The cubic root of 165166544 is about 548.6651308914.

The spelling of 165166544 in words is "one hundred sixty-five million, one hundred sixty-six thousand, five hundred forty-four".