100047666681 has 24 divisors (see below), whose sum is σ = 145682334720. Its totient is φ = 66159114336.

The previous prime is 100047666647. The next prime is 100047666683. The reversal of 100047666681 is 186666740001.

It is not a de Polignac number, because 100047666681 - 2¹⁸ = 100047404537 is a prime.

It is a super-2 number, since 2×100047666681² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (100047666683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10617190 + ... + 10626608.

It is an arithmetic number, because the mean of its divisors is an integer number (6070097280).

Almost surely, 2^100047666681 is an apocalyptic number.

It is an amenable number.

100047666681 is a deficient number, since it is larger than the sum of its proper divisors (45634668039).

100047666681 is a wasteful number, since it uses less digits than its factorization.

100047666681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18845 (or 18842 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 100047666681 in words is "one hundred billion, forty-seven million, six hundred sixty-six thousand, six hundred eighty-one".