55666066655 has 8 divisors (see below), whose sum is σ = 66801315600. Its totient is φ = 44531496256.

The previous prime is 55666066637. The next prime is 55666066657.

55666066655 is nontrivially palindromic in base 10.

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 55666066655 - 2¹⁶ = 55666001119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55666066655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55666066657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32816 + ... + 335274.

It is an arithmetic number, because the mean of its divisors is an integer number (8350164450).

Almost surely, 2^55666066655 is an apocalyptic number.

55666066655 is a deficient number, since it is larger than the sum of its proper divisors (11135248945).

55666066655 is a wasteful number, since it uses less digits than its factorization.

55666066655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339273.

The product of its (nonzero) digits is 29160000, while the sum is 56.

The spelling of 55666066655 in words is "fifty-five billion, six hundred sixty-six million, sixty-six thousand, six hundred fifty-five".