6666333385555 has 4 divisors (see below), whose sum is σ = 7999600062672. Its totient is φ = 5333066708440.

The previous prime is 6666333385529. The next prime is 6666333385559. The reversal of 6666333385555 is 5555833336666.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6666333385555 - 2³¹ = 6664185901907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6666333385559) 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 3 ways as a sum of consecutive naturals, for example, 666633338551 + ... + 666633338560.

It is an arithmetic number, because the mean of its divisors is an integer number (1999900015668).

Almost surely, 2^{6666333385555} is an apocalyptic number.

6666333385555 is a deficient number, since it is larger than the sum of its proper divisors (1333266677117).

6666333385555 is a wasteful number, since it uses less digits than its factorization.

6666333385555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333266677116.

The product of its digits is 524880000, while the sum is 64.

The spelling of 6666333385555 in words is "six trillion, six hundred sixty-six billion, three hundred thirty-three million, three hundred eighty-five thousand, five hundred fifty-five".