665573160 has 128 divisors (see below), whose sum is σ = 2288056320. Its totient is φ = 151725312.

The previous prime is 665573147. The next prime is 665573179. The reversal of 665573160 is 61375566.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 408267 + ... + 409893.

It is an arithmetic number, because the mean of its divisors is an integer number (17875440).

Almost surely, 2^665573160 is an apocalyptic number.

665573160 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 665573160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1144028160).

665573160 is an abundant number, since it is smaller than the sum of its proper divisors (1622483160).

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

665573160 is a wasteful number, since it uses less digits than its factorization.

665573160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135 (or 2131 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 39.

The square root of 665573160 is about 25798.7046186432. The cubic root of 665573160 is about 873.1025703196.

The spelling of 665573160 in words is "six hundred sixty-five million, five hundred seventy-three thousand, one hundred sixty".