665552160 has 384 divisors, whose sum is σ = 2868687360. Its totient is φ = 140341248.

The previous prime is 665552149. The next prime is 665552177. The reversal of 665552160 is 61255566.

It is a happy number.

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

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 63 ways as a sum of consecutive naturals, for example, 392274 + ... + 393966.

It is an arithmetic number, because the mean of its divisors is an integer number (7470540).

Almost surely, 2^665552160 is an apocalyptic number.

665552160 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 665552160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1434343680).

665552160 is an abundant number, since it is smaller than the sum of its proper divisors (2203135200).

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

665552160 is a wasteful number, since it uses less digits than its factorization.

665552160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1737 (or 1723 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 665552160 is about 25798.2976182538. The cubic root of 665552160 is about 873.0933875841.

The spelling of 665552160 in words is "six hundred sixty-five million, five hundred fifty-two thousand, one hundred sixty".