6381866631 has 8 divisors (see below), whose sum is σ = 9724749184. Its totient is φ = 3646780920.

The previous prime is 6381866587. The next prime is 6381866641. The reversal of 6381866631 is 1366681836.

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

It is not a de Polignac number, because 6381866631 - 2²⁵ = 6348312199 is a prime.

It is a super-2 number, since 2×6381866631² = 81456443391742580322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6381866641) 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, 151949185 + ... + 151949226.

It is an arithmetic number, because the mean of its divisors is an integer number (1215593648).

Almost surely, 2^6381866631 is an apocalyptic number.

6381866631 is a deficient number, since it is larger than the sum of its proper divisors (3342882553).

6381866631 is a wasteful number, since it uses less digits than its factorization.

6381866631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303898421.

The product of its digits is 746496, while the sum is 48.

The square root of 6381866631 is about 79886.5860517271. The cubic root of 6381866631 is about 1854.8803821899.

The spelling of 6381866631 in words is "six billion, three hundred eighty-one million, eight hundred sixty-six thousand, six hundred thirty-one".