66560226673 has 4 divisors (see below), whose sum is σ = 67553662960. Its totient is φ = 65566790388.

The previous prime is 66560226647. The next prime is 66560226743. The reversal of 66560226673 is 37662206566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66560226673 - 2¹³ = 66560218481 is a prime.

It is a super-2 number, since 2×66560226673² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66563226673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 496718043 + ... + 496718176.

It is an arithmetic number, because the mean of its divisors is an integer number (16888415740).

Almost surely, 2^66560226673 is an apocalyptic number.

It is an amenable number.

66560226673 is a deficient number, since it is larger than the sum of its proper divisors (993436287).

66560226673 is an equidigital number, since it uses as much as digits as its factorization.

66560226673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993436286.

The product of its (nonzero) digits is 3265920, while the sum is 49.

The spelling of 66560226673 in words is "sixty-six billion, five hundred sixty million, two hundred twenty-six thousand, six hundred seventy-three".