100643094666 has 48 divisors (see below), whose sum is σ = 223516100808. Its totient is φ = 32709312000.

The previous prime is 100643094659. The next prime is 100643094683. The reversal of 100643094666 is 666490346001.

It can be written as a sum of positive squares in 4 ways, for example, as 61266645441 + 39376449225 = 247521^2 + 198435^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1181716 + ... + 1264016.

Almost surely, 2^100643094666 is an apocalyptic number.

100643094666 is an abundant number, since it is smaller than the sum of its proper divisors (122873006142).

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

100643094666 is a wasteful number, since it uses less digits than its factorization.

100643094666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84007 (or 84004 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The spelling of 100643094666 in words is "one hundred billion, six hundred forty-three million, ninety-four thousand, six hundred sixty-six".