66560226672 has 20 divisors (see below), whose sum is σ = 171947252360. Its totient is φ = 22186742208.

The previous prime is 66560226647. The next prime is 66560226743. The reversal of 66560226672 is 27662206566.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 1386671389 = 66560226672 / (6 + 6 + 5 + 6 + 0 + 2 + 2 + 6 + 6 + 7 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693335647 + ... + 693335742.

It is an arithmetic number, because the mean of its divisors is an integer number (8597362618).

Almost surely, 2^66560226672 is an apocalyptic number.

It is an amenable number.

66560226672 is an abundant number, since it is smaller than the sum of its proper divisors (105387025688).

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

66560226672 is a wasteful number, since it uses less digits than its factorization.

66560226672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1386671400 (or 1386671394 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 48.

The spelling of 66560226672 in words is "sixty-six billion, five hundred sixty million, two hundred twenty-six thousand, six hundred seventy-two".