669520287663 has 64 divisors (see below), whose sum is σ = 955891776000. Its totient is φ = 415637028864.

The previous prime is 669520287649. The next prime is 669520287671. The reversal of 669520287663 is 366782025966.

It is not a de Polignac number, because 669520287663 - 2⁴ = 669520287647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 669520287597 and 669520287606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669520287643) 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 63 ways as a sum of consecutive naturals, for example, 626304693 + ... + 626305761.

It is an arithmetic number, because the mean of its divisors is an integer number (14935809000).

Almost surely, 2^669520287663 is an apocalyptic number.

669520287663 is a deficient number, since it is larger than the sum of its proper divisors (286371488337).

669520287663 is a wasteful number, since it uses less digits than its factorization.

669520287663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944.

The product of its (nonzero) digits is 39191040, while the sum is 60.

The spelling of 669520287663 in words is "six hundred sixty-nine billion, five hundred twenty million, two hundred eighty-seven thousand, six hundred sixty-three".