66204226404 has 72 divisors (see below), whose sum is σ = 168079242240. Its totient is φ = 21972065472.

The previous prime is 66204226381. The next prime is 66204226493. The reversal of 66204226404 is 40462240266.

66204226404 is a `hidden beast` number, since 6 + 6 + 2 + 0 + 4 + 2 + 2 + 640 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 8530894 + ... + 8538650.

It is an arithmetic number, because the mean of its divisors is an integer number (2334433920).

Almost surely, 2^66204226404 is an apocalyptic number.

It is an amenable number.

66204226404 is an abundant number, since it is smaller than the sum of its proper divisors (101875015836).

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

66204226404 is a wasteful number, since it uses less digits than its factorization.

66204226404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8769 (or 8764 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The spelling of 66204226404 in words is "sixty-six billion, two hundred four million, two hundred twenty-six thousand, four hundred four".