28766266664 has 8 divisors (see below), whose sum is σ = 53936750010. Its totient is φ = 14383133328.

The previous prime is 28766266651. The next prime is 28766266673. The reversal of 28766266664 is 46666266782.

It can be written as a sum of positive squares in only one way, i.e., 28406405764 + 359860900 = 168542^2 + 18970^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1797891659 + ... + 1797891674.

Almost surely, 2^28766266664 is an apocalyptic number.

It is an amenable number.

28766266664 is a deficient number, since it is larger than the sum of its proper divisors (25170483346).

28766266664 is a wasteful number, since it uses less digits than its factorization.

28766266664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3595783339 (or 3595783335 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 59.

The spelling of 28766266664 in words is "twenty-eight billion, seven hundred sixty-six million, two hundred sixty-six thousand, six hundred sixty-four".