165798520 has 16 divisors (see below), whose sum is σ = 373046760. Its totient is φ = 66319392.

The previous prime is 165798499. The next prime is 165798527. The reversal of 165798520 is 25897561.

165798520 is digitally balanced in base 2, 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 (165798527) 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, 2072442 + ... + 2072521.

Almost surely, 2^165798520 is an apocalyptic number.

165798520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165798520 is an abundant number, since it is smaller than the sum of its proper divisors (207248240).

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

165798520 is a wasteful number, since it uses less digits than its factorization.

165798520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4144974 (or 4144970 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 43.

The square root of 165798520 is about 12876.2774123580. The cubic root of 165798520 is about 549.3640252251.

The spelling of 165798520 in words is "one hundred sixty-five million, seven hundred ninety-eight thousand, five hundred twenty".