165610020 has 48 divisors (see below), whose sum is σ = 466095168. Its totient is φ = 43935360.

The previous prime is 165609973. The next prime is 165610057. The reversal of 165610020 is 20016561.

It is a happy 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, 4815 + ... + 18825.

It is an arithmetic number, because the mean of its divisors is an integer number (9710316).

Almost surely, 2^165610020 is an apocalyptic number.

165610020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165610020 is an abundant number, since it is smaller than the sum of its proper divisors (300485148).

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

165610020 is a wasteful number, since it uses less digits than its factorization.

165610020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14220 (or 14218 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 165610020 is about 12868.9556685848. The cubic root of 165610020 is about 549.1557515761.

Adding to 165610020 its reverse (20016561), we get a palindrome (185626581).

The spelling of 165610020 in words is "one hundred sixty-five million, six hundred ten thousand, twenty".