663432676967 has 4 divisors (see below), whose sum is σ = 681363289896. Its totient is φ = 645502064040.

The previous prime is 663432676927. The next prime is 663432676997. The reversal of 663432676967 is 769676234366.

It is a happy number.

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 663432676967 - 2²² = 663428482663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663432676927) 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, 8965306409 + ... + 8965306482.

It is an arithmetic number, because the mean of its divisors is an integer number (170340822474).

Almost surely, 2^663432676967 is an apocalyptic number.

663432676967 is a deficient number, since it is larger than the sum of its proper divisors (17930612929).

663432676967 is a wasteful number, since it uses less digits than its factorization.

663432676967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17930612928.

The product of its digits is 246903552, while the sum is 65.

The spelling of 663432676967 in words is "six hundred sixty-three billion, four hundred thirty-two million, six hundred seventy-six thousand, nine hundred sixty-seven".