100866892886681 has 4 divisors (see below), whose sum is σ = 106800239527092. Its totient is φ = 94933546246272.

The previous prime is 100866892886671. The next prime is 100866892886701. The reversal of 100866892886681 is 186688298668001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 72340825526281 + 28526067360400 = 8505341^2 + 5340980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100866892886681 is a prime.

It is a super-2 number, since 2×100866892886681² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100866892886671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2966673320180 + ... + 2966673320213.

It is an arithmetic number, because the mean of its divisors is an integer number (26700059881773).

Almost surely, 2^{100866892886681} is an apocalyptic number.

It is an amenable number.

100866892886681 is a deficient number, since it is larger than the sum of its proper divisors (5933346640411).

100866892886681 is an equidigital number, since it uses as much as digits as its factorization.

100866892886681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5933346640410.

The product of its (nonzero) digits is 764411904, while the sum is 77.

The spelling of 100866892886681 in words is "one hundred trillion, eight hundred sixty-six billion, eight hundred ninety-two million, eight hundred eighty-six thousand, six hundred eighty-one".