660345206500 has 96 divisors (see below), whose sum is σ = 1648462233600. Its totient is φ = 226371024000.

The previous prime is 660345206449. The next prime is 660345206533. The reversal of 660345206500 is 5602543066.

It is a self number, because there is not a number n which added to its sum of digits gives 660345206500.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44789130 + ... + 44803870.

It is an arithmetic number, because the mean of its divisors is an integer number (17171481600).

Almost surely, 2^660345206500 is an apocalyptic number.

It is an amenable number.

660345206500 is an abundant number, since it is smaller than the sum of its proper divisors (988117027100).

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

660345206500 is a wasteful number, since it uses less digits than its factorization.

660345206500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27566 (or 27554 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 37.

Adding to 660345206500 its reverse (5602543066), we get a palindrome (665947749566).

The spelling of 660345206500 in words is "six hundred sixty billion, three hundred forty-five million, two hundred six thousand, five hundred".