66404505222 has 48 divisors (see below), whose sum is σ = 166188823632. Its totient is φ = 18938895360.

The previous prime is 66404505179. The next prime is 66404505247. The reversal of 66404505222 is 22250540466.

66404505222 is a `hidden beast` number, since 6 + 640 + 4 + 5 + 0 + 5 + 2 + 2 + 2 = 666.

It is a congruent 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 23 ways as a sum of consecutive naturals, for example, 9860643 + ... + 9867374.

It is an arithmetic number, because the mean of its divisors is an integer number (3462267159).

Almost surely, 2^66404505222 is an apocalyptic number.

66404505222 is an abundant number, since it is smaller than the sum of its proper divisors (99784318410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66404505222 is a wasteful number, since it uses less digits than its factorization.

66404505222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19728053 (or 19728050 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The spelling of 66404505222 in words is "sixty-six billion, four hundred four million, five hundred five thousand, two hundred twenty-two".