551660110666 has 32 divisors (see below), whose sum is σ = 956065213440. Its totient is φ = 233843963136.

The previous prime is 551660110663. The next prime is 551660110667. The reversal of 551660110666 is 666011066155.

It is not an unprimeable number, because it can be changed into a prime (551660110663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 393780 + ... + 1121776.

It is an arithmetic number, because the mean of its divisors is an integer number (29877037920).

Almost surely, 2^551660110666 is an apocalyptic number.

551660110666 is a deficient number, since it is larger than the sum of its proper divisors (404405102774).

551660110666 is a wasteful number, since it uses less digits than its factorization.

551660110666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728598.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 551660110666 in words is "five hundred fifty-one billion, six hundred sixty million, one hundred ten thousand, six hundred sixty-six".