66223020355 has 8 divisors (see below), whose sum is σ = 79814646000. Its totient is φ = 52747068576.

The previous prime is 66223020343. The next prime is 66223020371. The reversal of 66223020355 is 55302032266.

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

It is not a de Polignac number, because 66223020355 - 2¹⁵ = 66222987587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66223020355.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 28917205 + ... + 28919494.

It is an arithmetic number, because the mean of its divisors is an integer number (9976830750).

Almost surely, 2^66223020355 is an apocalyptic number.

66223020355 is a deficient number, since it is larger than the sum of its proper divisors (13591625645).

66223020355 is a wasteful number, since it uses less digits than its factorization.

66223020355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57836933.

The product of its (nonzero) digits is 64800, while the sum is 34.

The spelling of 66223020355 in words is "sixty-six billion, two hundred twenty-three million, twenty thousand, three hundred fifty-five".