5551553544666 has 32 divisors (see below), whose sum is σ = 11135285016768. Its totient is φ = 1845162412800.

The previous prime is 5551553544653. The next prime is 5551553544697. The reversal of 5551553544666 is 6664453551555.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1999116 + ... + 3885816.

It is an arithmetic number, because the mean of its divisors is an integer number (347977656774).

Almost surely, 2^{5551553544666} is an apocalyptic number.

5551553544666 is an abundant number, since it is smaller than the sum of its proper divisors (5583731472102).

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

5551553544666 is a wasteful number, since it uses less digits than its factorization.

5551553544666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888126.

The product of its digits is 162000000, while the sum is 60.

The spelling of 5551553544666 in words is "five trillion, five hundred fifty-one billion, five hundred fifty-three million, five hundred forty-four thousand, six hundred sixty-six".