665741160 has 256 divisors, whose sum is σ = 2562969600. Its totient is φ = 150564096.

The previous prime is 665741159. The next prime is 665741189. The reversal of 665741160 is 61147566.

It is a super-2 number, since 2×665741160² = 886422584236291200, which contains 22 as substring.

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 (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 808509 + ... + 809331.

It is an arithmetic number, because the mean of its divisors is an integer number (10011600).

Almost surely, 2^665741160 is an apocalyptic number.

665741160 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 665741160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1281484800).

665741160 is an abundant number, since it is smaller than the sum of its proper divisors (1897228440).

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

665741160 is a wasteful number, since it uses less digits than its factorization.

665741160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957 (or 947 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 665741160 is about 25801.9603906370. The cubic root of 665741160 is about 873.1760252508.

The spelling of 665741160 in words is "six hundred sixty-five million, seven hundred forty-one thousand, one hundred sixty".