55065221866681 has 8 divisors (see below), whose sum is σ = 59306282804160. Its totient is φ = 50824914449232.

The previous prime is 55065221866673. The next prime is 55065221866687. The reversal of 55065221866681 is 18666812256055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55065221866681 - 2³ = 55065221866673 is a prime.

It is a super-2 number, since 2×55065221866681² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55065221866687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188228221 + ... + 188520538.

It is an arithmetic number, because the mean of its divisors is an integer number (7413285350520).

Almost surely, 2^{55065221866681} is an apocalyptic number.

It is an amenable number.

55065221866681 is a deficient number, since it is larger than the sum of its proper divisors (4241060937479).

55065221866681 is a wasteful number, since it uses less digits than its factorization.

55065221866681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376760015.

The product of its (nonzero) digits is 41472000, while the sum is 61.

The spelling of 55065221866681 in words is "fifty-five trillion, sixty-five billion, two hundred twenty-one million, eight hundred sixty-six thousand, six hundred eighty-one".