165165140 has 24 divisors (see below), whose sum is σ = 396396672. Its totient is φ = 56628000.

The previous prime is 165165127. The next prime is 165165163. The reversal of 165165140 is 41561561.

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, 589736 + ... + 590015.

It is an arithmetic number, because the mean of its divisors is an integer number (16516528).

Almost surely, 2^165165140 is an apocalyptic number.

165165140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165165140 is an abundant number, since it is smaller than the sum of its proper divisors (231231532).

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

165165140 is a wasteful number, since it uses less digits than its factorization.

165165140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179767 (or 1179765 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 165165140 is about 12851.6590368715. The cubic root of 165165140 is about 548.6635762423.

The spelling of 165165140 in words is "one hundred sixty-five million, one hundred sixty-five thousand, one hundred forty".