647045066607 has 4 divisors (see below), whose sum is σ = 862726755480. Its totient is φ = 431363377736.

The previous prime is 647045066567. The next prime is 647045066663. The reversal of 647045066607 is 706660540746.

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

It is a cyclic number.

It is not a de Polignac number, because 647045066607 - 2⁸ = 647045066351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 647045066607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647045076607) 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, 107840844432 + ... + 107840844437.

It is an arithmetic number, because the mean of its divisors is an integer number (215681688870).

Almost surely, 2^647045066607 is an apocalyptic number.

647045066607 is a deficient number, since it is larger than the sum of its proper divisors (215681688873).

647045066607 is a wasteful number, since it uses less digits than its factorization.

647045066607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215681688872.

The product of its (nonzero) digits is 5080320, while the sum is 51.

The spelling of 647045066607 in words is "six hundred forty-seven billion, forty-five million, sixty-six thousand, six hundred seven".