665228160 has 256 divisors, whose sum is σ = 2381659200. Its totient is φ = 175472640.

The previous prime is 665228153. The next prime is 665228183. The reversal of 665228160 is 61822566.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2367220 + ... + 2367500.

Almost surely, 2^665228160 is an apocalyptic number.

665228160 is a gapful number since it is divisible by the number (60) 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 665228160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1190829600).

665228160 is an abundant number, since it is smaller than the sum of its proper divisors (1716431040).

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

665228160 is a wasteful number, since it uses less digits than its factorization.

665228160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 665228160 is about 25792.0173697212. The cubic root of 665228160 is about 872.9516866072.

The spelling of 665228160 in words is "six hundred sixty-five million, two hundred twenty-eight thousand, one hundred sixty".