100061666661 has 16 divisors (see below), whose sum is σ = 145586461248. Its totient is φ = 60625843200.

The previous prime is 100061666659. The next prime is 100061666687. The reversal of 100061666661 is 166666160001.

It is a happy number.

It is not a de Polignac number, because 100061666661 - 2¹ = 100061666659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100061666611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 323836 + ... + 552261.

It is an arithmetic number, because the mean of its divisors is an integer number (9099153828).

Almost surely, 2^100061666661 is an apocalyptic number.

100061666661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100061666661 is a deficient number, since it is larger than the sum of its proper divisors (45524794587).

100061666661 is a wasteful number, since it uses less digits than its factorization.

100061666661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879572.

The product of its (nonzero) digits is 46656, while the sum is 39.

The spelling of 100061666661 in words is "one hundred billion, sixty-one million, six hundred sixty-six thousand, six hundred sixty-one".