100066666081 has 2 divisors, whose sum is σ = 100066666082. Its totient is φ = 100066666080.

The previous prime is 100066666079. The next prime is 100066666111. The reversal of 100066666081 is 180666660001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99865480225 + 201185856 = 316015^2 + 14184^2 .

It is a cyclic number.

It is not a de Polignac number, because 100066666081 - 2¹ = 100066666079 is a prime.

It is a super-2 number, since 2×100066666081² (a number of 23 digits) contains 22 as substring.

Together with 100066666079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (100066666481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50033333040 + 50033333041.

It is an arithmetic number, because the mean of its divisors is an integer number (50033333041).

Almost surely, 2^100066666081 is an apocalyptic number.

It is an amenable number.

100066666081 is a deficient number, since it is larger than the sum of its proper divisors (1).

100066666081 is an equidigital number, since it uses as much as digits as its factorization.

100066666081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 100066666081 in words is "one hundred billion, sixty-six million, six hundred sixty-six thousand, eighty-one".