6381366386 has 8 divisors (see below), whose sum is σ = 9574269660. Its totient is φ = 3189943168.

The previous prime is 6381366377. The next prime is 6381366401. The reversal of 6381366386 is 6836631836.

It can be written as a sum of positive squares in 2 ways, for example, as 3548465761 + 2832900625 = 59569^2 + 53225^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359171 + ... + 376518.

Almost surely, 2^6381366386 is an apocalyptic number.

6381366386 is a deficient number, since it is larger than the sum of its proper divisors (3192903274).

6381366386 is a wasteful number, since it uses less digits than its factorization.

6381366386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 740028.

The product of its digits is 2239488, while the sum is 50.

The square root of 6381366386 is about 79883.4550204233. The cubic root of 6381366386 is about 1854.8319157597.

The spelling of 6381366386 in words is "six billion, three hundred eighty-one million, three hundred sixty-six thousand, three hundred eighty-six".