505000556666 has 16 divisors (see below), whose sum is σ = 836931870144. Its totient is φ = 227314828224.

The previous prime is 505000556633. The next prime is 505000556701. The reversal of 505000556666 is 666655000505.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322889600 + ... + 322891163.

It is an arithmetic number, because the mean of its divisors is an integer number (52308241884).

Almost surely, 2^505000556666 is an apocalyptic number.

505000556666 is a deficient number, since it is larger than the sum of its proper divisors (331931313478).

505000556666 is a wasteful number, since it uses less digits than its factorization.

505000556666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645780805.

The product of its (nonzero) digits is 810000, while the sum is 44.

The spelling of 505000556666 in words is "five hundred five billion, five hundred fifty-six thousand, six hundred sixty-six".