66853550555 has 16 divisors (see below), whose sum is σ = 87602335488. Its totient is φ = 48573564000.

The previous prime is 66853550551. The next prime is 66853550567. The reversal of 66853550555 is 55505535866.

It is not a de Polignac number, because 66853550555 - 2² = 66853550551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66853550497 and 66853550506.

It is not an unprimeable number, because it can be changed into a prime (66853550551) 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, 532781 + ... + 646190.

It is an arithmetic number, because the mean of its divisors is an integer number (5475145968).

Almost surely, 2^66853550555 is an apocalyptic number.

66853550555 is a deficient number, since it is larger than the sum of its proper divisors (20748784933).

66853550555 is a wasteful number, since it uses less digits than its factorization.

66853550555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180018.

The product of its (nonzero) digits is 13500000, while the sum is 53.

The spelling of 66853550555 in words is "sixty-six billion, eight hundred fifty-three million, five hundred fifty thousand, five hundred fifty-five".