8376666681 has 8 divisors (see below), whose sum is σ = 11169805120. Its totient is φ = 5583986352.

The previous prime is 8376666653. The next prime is 8376666703. The reversal of 8376666681 is 1866666738.

It is a happy number.

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

It is not a de Polignac number, because 8376666681 - 2¹⁴ = 8376650297 is a prime.

It is a super-3 number, since 3×8376666681³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8376676681) 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, 69310 + ... + 146823.

It is an arithmetic number, because the mean of its divisors is an integer number (1396225640).

Almost surely, 2^8376666681 is an apocalyptic number.

It is an amenable number.

8376666681 is a deficient number, since it is larger than the sum of its proper divisors (2793138439).

8376666681 is a wasteful number, since it uses less digits than its factorization.

8376666681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229055.

The product of its digits is 10450944, while the sum is 57.

The square root of 8376666681 is about 91524.1316866759. The cubic root of 8376666681 is about 2030.9087538259.

Adding to 8376666681 its sum of digits (57), we get a palindrome (8376666738).

The spelling of 8376666681 in words is "eight billion, three hundred seventy-six million, six hundred sixty-six thousand, six hundred eighty-one".