660851044 has 36 divisors (see below), whose sum is σ = 1349298300. Its totient is φ = 282381120.

The previous prime is 660851041. The next prime is 660851071. The reversal of 660851044 is 440158066.

660851044 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 164096100 + 496754944 = 12810^2 + 22288^2 .

It is not an unprimeable number, because it can be changed into a prime (660851041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63574 + ... + 73234.

Almost surely, 2^660851044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660851044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (674649150).

660851044 is an abundant number, since it is smaller than the sum of its proper divisors (688447256).

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

660851044 is a wasteful number, since it uses less digits than its factorization.

660851044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10028 (or 10019 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 660851044 is about 25707.0232426860. The cubic root of 660851044 is about 871.0328351103.

The spelling of 660851044 in words is "six hundred sixty million, eight hundred fifty-one thousand, forty-four".