660535004 has 24 divisors (see below), whose sum is σ = 1166624928. Its totient is φ = 327225600.

The previous prime is 660535003. The next prime is 660535013. The reversal of 660535004 is 400535066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660535003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274832 + ... + 277224.

It is an arithmetic number, because the mean of its divisors is an integer number (48609372).

Almost surely, 2^660535004 is an apocalyptic number.

It is an amenable number.

660535004 is a deficient number, since it is larger than the sum of its proper divisors (506089924).

660535004 is a wasteful number, since it uses less digits than its factorization.

660535004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3005 (or 3003 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 660535004 is about 25700.8755492882. The cubic root of 660535004 is about 870.8939610962.

The spelling of 660535004 in words is "six hundred sixty million, five hundred thirty-five thousand, four".