866763832003638 has 8 divisors (see below), whose sum is σ = 1733527664007288. Its totient is φ = 288921277334544.

The previous prime is 866763832003603. The next prime is 866763832003673. The reversal of 866763832003638 is 836300238367668.

It is an interprime number because it is at equal distance from previous prime (866763832003603) and next prime (866763832003673).

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

866763832003638 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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, 72230319333631 + ... + 72230319333642.

It is an arithmetic number, because the mean of its divisors is an integer number (216690958000911).

Almost surely, 2^{866763832003638} is an apocalyptic number.

866763832003638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866763832003638 is a wasteful number, since it uses less digits than its factorization.

866763832003638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144460638667278.

The product of its (nonzero) digits is 752467968, while the sum is 69.

The spelling of 866763832003638 in words is "eight hundred sixty-six trillion, seven hundred sixty-three billion, eight hundred thirty-two million, three thousand, six hundred thirty-eight".