165980870 has 32 divisors (see below), whose sum is σ = 326730240. Its totient is φ = 60207840.

The previous prime is 165980869. The next prime is 165980887. The reversal of 165980870 is 78089561.

It is a happy number.

165980870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×165980870³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49301 + ... + 52559.

It is an arithmetic number, because the mean of its divisors is an integer number (10210320).

Almost surely, 2^165980870 is an apocalyptic number.

165980870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165980870 is a deficient number, since it is larger than the sum of its proper divisors (160749370).

165980870 is a wasteful number, since it uses less digits than its factorization.

165980870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3740.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 165980870 is about 12883.3563173577. The cubic root of 165980870 is about 549.5653535738.

The spelling of 165980870 in words is "one hundred sixty-five million, nine hundred eighty thousand, eight hundred seventy".