660231615040 has 112 divisors (see below), whose sum is σ = 1589061876480. Its totient is φ = 261261527040.

The previous prime is 660231615031. The next prime is 660231615067. The reversal of 660231615040 is 40516132066.

660231615040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 660231614987 and 660231615005.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33972046 + ... + 33991474.

Almost surely, 2^660231615040 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 660231615040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (794530938240).

660231615040 is an abundant number, since it is smaller than the sum of its proper divisors (928830261440).

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

660231615040 is a wasteful number, since it uses less digits than its factorization.

660231615040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20580 (or 20570 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 660231615040 in words is "six hundred sixty billion, two hundred thirty-one million, six hundred fifteen thousand, forty".