100555555566 has 32 divisors (see below), whose sum is σ = 211584286368. Its totient is φ = 31817180160.

The previous prime is 100555555561. The next prime is 100555555613. The reversal of 100555555566 is 665555555001.

It is a super-2 number, since 2×100555555566² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100555555561) 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, 5514715 + ... + 5532918.

It is an arithmetic number, because the mean of its divisors is an integer number (6612008949).

Almost surely, 2^100555555566 is an apocalyptic number.

100555555566 is an abundant number, since it is smaller than the sum of its proper divisors (111028730802).

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

100555555566 is a wasteful number, since it uses less digits than its factorization.

100555555566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11047716.

The product of its (nonzero) digits is 2812500, while the sum is 48.

The spelling of 100555555566 in words is "one hundred billion, five hundred fifty-five million, five hundred fifty-five thousand, five hundred sixty-six".