66223854775 has 12 divisors (see below), whose sum is σ = 88434317272. Its totient is φ = 48903769440.

The previous prime is 66223854757. The next prime is 66223854787. The reversal of 66223854775 is 57745832266.

It is not a de Polignac number, because 66223854775 - 2³¹ = 64076371127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101882529 + ... + 101883178.

Almost surely, 2^66223854775 is an apocalyptic number.

66223854775 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66223854775 is a deficient number, since it is larger than the sum of its proper divisors (22210462497).

66223854775 is a wasteful number, since it uses less digits than its factorization.

66223854775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203765730 (or 203765725 counting only the distinct ones).

The product of its digits is 16934400, while the sum is 55.

The spelling of 66223854775 in words is "sixty-six billion, two hundred twenty-three million, eight hundred fifty-four thousand, seven hundred seventy-five".