664884863207 has 8 divisors (see below), whose sum is σ = 677464171200. Its totient is φ = 652306826080.

The previous prime is 664884863183. The next prime is 664884863231. The reversal of 664884863207 is 702368488466.

It is an interprime number because it is at equal distance from previous prime (664884863183) and next prime (664884863231).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 664884863207 - 2²⁰ = 664883814631 is a prime.

It is a super-2 number, since 2×664884863207² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 664884863207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664884863257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 773657 + ... + 1388637.

It is an arithmetic number, because the mean of its divisors is an integer number (84683021400).

Almost surely, 2^664884863207 is an apocalyptic number.

664884863207 is a deficient number, since it is larger than the sum of its proper divisors (12579307993).

664884863207 is a wasteful number, since it uses less digits than its factorization.

664884863207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635433.

The product of its (nonzero) digits is 74317824, while the sum is 62.

The spelling of 664884863207 in words is "six hundred sixty-four billion, eight hundred eighty-four million, eight hundred sixty-three thousand, two hundred seven".