6379986681 has 8 divisors (see below), whose sum is σ = 9451832160. Its totient is φ = 4253324436.

The previous prime is 6379986637. The next prime is 6379986731. The reversal of 6379986681 is 1866899736.

It is not a de Polignac number, because 6379986681 - 2¹³ = 6379978489 is a prime.

It is a super-2 number, since 2×6379986681² = 81408460099474791522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6379286681) 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, 118147875 + ... + 118147928.

It is an arithmetic number, because the mean of its divisors is an integer number (1181479020).

Almost surely, 2^6379986681 is an apocalyptic number.

It is an amenable number.

6379986681 is a deficient number, since it is larger than the sum of its proper divisors (3071845479).

6379986681 is a wasteful number, since it uses less digits than its factorization.

6379986681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236295812 (or 236295806 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The square root of 6379986681 is about 79874.8188166959. The cubic root of 6379986681 is about 1854.6982293791.

The spelling of 6379986681 in words is "six billion, three hundred seventy-nine million, nine hundred eighty-six thousand, six hundred eighty-one".