165407380 has 24 divisors (see below), whose sum is σ = 351544032. Its totient is φ = 65365152.

The previous prime is 165407377. The next prime is 165407381. The reversal of 165407380 is 83704561.

165407380 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165407381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48162 + ... + 51481.

It is an arithmetic number, because the mean of its divisors is an integer number (14647668).

Almost surely, 2^165407380 is an apocalyptic number.

165407380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165407380 is an abundant number, since it is smaller than the sum of its proper divisors (186136652).

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

165407380 is a wasteful number, since it uses less digits than its factorization.

165407380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99735 (or 99733 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 165407380 is about 12861.0800479586. The cubic root of 165407380 is about 548.9316782983.

The spelling of 165407380 in words is "one hundred sixty-five million, four hundred seven thousand, three hundred eighty".