660066006500 has 48 divisors (see below), whose sum is σ = 1443362583936. Its totient is φ = 263700684000.

The previous prime is 660066006493. The next prime is 660066006521. The reversal of 660066006500 is 5600660066.

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, 408392 + ... + 1219391.

It is an arithmetic number, because the mean of its divisors is an integer number (30070053832).

Almost surely, 2^660066006500 is an apocalyptic number.

It is an amenable number.

660066006500 is an abundant number, since it is smaller than the sum of its proper divisors (783296577436).

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

660066006500 is a wasteful number, since it uses less digits than its factorization.

660066006500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628613 (or 1628601 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

Adding to 660066006500 its reverse (5600660066), we get a palindrome (665666666566).

The spelling of 660066006500 in words is "six hundred sixty billion, sixty-six million, six thousand, five hundred".