165699360 has 144 divisors (see below), whose sum is σ = 590151744. Its totient is φ = 42256896.

The previous prime is 165699343. The next prime is 165699367. The reversal of 165699360 is 63996561.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (165699367) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30619 + ... + 35621.

It is an arithmetic number, because the mean of its divisors is an integer number (4098276).

Almost surely, 2^165699360 is an apocalyptic number.

165699360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165699360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295075872).

165699360 is an abundant number, since it is smaller than the sum of its proper divisors (424452384).

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

165699360 is a wasteful number, since it uses less digits than its factorization.

165699360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5047 (or 5036 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The square root of 165699360 is about 12872.4263447106. The cubic root of 165699360 is about 549.2544830322.

The spelling of 165699360 in words is "one hundred sixty-five million, six hundred ninety-nine thousand, three hundred sixty".