66622402355 has 4 divisors (see below), whose sum is σ = 79946882832. Its totient is φ = 53297921880.

The previous prime is 66622402321. The next prime is 66622402373. The reversal of 66622402355 is 55320422666.

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

It is not a de Polignac number, because 66622402355 - 2¹⁰ = 66622401331 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6662240231 + ... + 6662240240.

It is an arithmetic number, because the mean of its divisors is an integer number (19986720708).

Almost surely, 2^66622402355 is an apocalyptic number.

66622402355 is a deficient number, since it is larger than the sum of its proper divisors (13324480477).

66622402355 is a wasteful number, since it uses less digits than its factorization.

66622402355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13324480476.

The product of its (nonzero) digits is 518400, while the sum is 41.

The spelling of 66622402355 in words is "sixty-six billion, six hundred twenty-two million, four hundred two thousand, three hundred fifty-five".