551666666100 has 72 divisors (see below), whose sum is σ = 1741260614688. Its totient is φ = 133737372800.

The previous prime is 551666666087. The next prime is 551666666107. The reversal of 551666666100 is 1666666155.

It is a super-2 number, since 2×551666666100² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 551666666100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551666666107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83582559 + ... + 83589158.

It is an arithmetic number, because the mean of its divisors is an integer number (24184175204).

Almost surely, 2^551666666100 is an apocalyptic number.

551666666100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

551666666100 is an abundant number, since it is smaller than the sum of its proper divisors (1189593948588).

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

551666666100 is a wasteful number, since it uses less digits than its factorization.

551666666100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167171745 (or 167171738 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 48.

Subtracting from 551666666100 its reverse (1666666155), we obtain a palindrome (549999999945).

The spelling of 551666666100 in words is "five hundred fifty-one billion, six hundred sixty-six million, six hundred sixty-six thousand, one hundred".