66655361522 has 4 divisors (see below), whose sum is σ = 99983042286. Its totient is φ = 33327680760.

The previous prime is 66655361519. The next prime is 66655361561. The reversal of 66655361522 is 22516355666.

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

It can be written as a sum of positive squares in only one way, i.e., 53768798161 + 12886563361 = 231881^2 + 113519^2 .

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 as a sum of consecutive naturals, namely, 16663840379 + ... + 16663840382.

Almost surely, 2^66655361522 is an apocalyptic number.

66655361522 is a deficient number, since it is larger than the sum of its proper divisors (33327680764).

66655361522 is a wasteful number, since it uses less digits than its factorization.

66655361522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33327680763.

The product of its digits is 1944000, while the sum is 47.

The spelling of 66655361522 in words is "sixty-six billion, six hundred fifty-five million, three hundred sixty-one thousand, five hundred twenty-two".