550105101666 has 12 divisors (see below), whose sum is σ = 1191894386982. Its totient is φ = 183368367216.

The previous prime is 550105101619. The next prime is 550105101739. The reversal of 550105101666 is 666101501055.

It can be written as a sum of positive squares in only one way, i.e., 434440492641 + 115664609025 = 659121^2 + 340095^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 550105101666.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15280697251 + ... + 15280697286.

Almost surely, 2^550105101666 is an apocalyptic number.

550105101666 is an abundant number, since it is smaller than the sum of its proper divisors (641789285316).

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

550105101666 is a wasteful number, since it uses less digits than its factorization.

550105101666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30561394545 (or 30561394542 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 550105101666 in words is "five hundred fifty billion, one hundred five million, one hundred one thousand, six hundred sixty-six".