660536940 has 96 divisors (see below), whose sum is σ = 2134379520. Its totient is φ = 149504256.

The previous prime is 660536917. The next prime is 660536941. The reversal of 660536940 is 49635066.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (660536941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35626 + ... + 50894.

It is an arithmetic number, because the mean of its divisors is an integer number (22233120).

Almost surely, 2^660536940 is an apocalyptic number.

660536940 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 660536940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1067189760).

660536940 is an abundant number, since it is smaller than the sum of its proper divisors (1473842580).

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

660536940 is a wasteful number, since it uses less digits than its factorization.

660536940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15391 (or 15389 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 39.

The square root of 660536940 is about 25700.9132133471. The cubic root of 660536940 is about 870.8948119464.

The spelling of 660536940 in words is "six hundred sixty million, five hundred thirty-six thousand, nine hundred forty".