63669887999 has 4 divisors (see below), whose sum is σ = 63735731664. Its totient is φ = 63604044336.

The previous prime is 63669887989. The next prime is 63669888013. The reversal of 63669887999 is 99978896636.

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 63669887999 - 2²⁴ = 63653110783 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 (63669887989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32920382 + ... + 32922315.

It is an arithmetic number, because the mean of its divisors is an integer number (15933932916).

Almost surely, 2^63669887999 is an apocalyptic number.

63669887999 is a deficient number, since it is larger than the sum of its proper divisors (65843665).

63669887999 is an equidigital number, since it uses as much as digits as its factorization.

63669887999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65843664.

The product of its digits is 1904684544, while the sum is 80.

The spelling of 63669887999 in words is "sixty-three billion, six hundred sixty-nine million, eight hundred eighty-seven thousand, nine hundred ninety-nine".