55550106661 has 16 divisors (see below), whose sum is σ = 68650523136. Its totient is φ = 43860047616.

The previous prime is 55550106659. The next prime is 55550106673. The reversal of 55550106661 is 16660105555.

It is not a de Polignac number, because 55550106661 - 2¹ = 55550106659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55550106961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4960446 + ... + 4971631.

It is an arithmetic number, because the mean of its divisors is an integer number (4290657696).

Almost surely, 2^55550106661 is an apocalyptic number.

It is an amenable number.

55550106661 is a deficient number, since it is larger than the sum of its proper divisors (13100416475).

55550106661 is a wasteful number, since it uses less digits than its factorization.

55550106661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9932148.

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 55550106661 in words is "fifty-five billion, five hundred fifty million, one hundred six thousand, six hundred sixty-one".