666837783500 has 48 divisors (see below), whose sum is σ = 1664427116352. Its totient is φ = 228630096000.

The previous prime is 666837783397. The next prime is 666837783571. The reversal of 666837783500 is 5387738666.

It is a self number, because there is not a number n which added to its sum of digits gives 666837783500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95259041 + ... + 95266040.

It is an arithmetic number, because the mean of its divisors is an integer number (34675564924).

Almost surely, 2^666837783500 is an apocalyptic number.

It is an amenable number.

666837783500 is an abundant number, since it is smaller than the sum of its proper divisors (997589332852).

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

666837783500 is a wasteful number, since it uses less digits than its factorization.

666837783500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190525107 (or 190525095 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 59.

The spelling of 666837783500 in words is "six hundred sixty-six billion, eight hundred thirty-seven million, seven hundred eighty-three thousand, five hundred".