8000167681 has 16 divisors (see below), whose sum is σ = 9028889856. Its totient is φ = 7025200000.

The previous prime is 8000167661. The next prime is 8000167687. The reversal of 8000167681 is 1867610008.

It is a cyclic number.

It is not a de Polignac number, because 8000167681 - 2⁹ = 8000167169 is a prime.

It is a super-2 number, since 2×8000167681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8000167681.

It is not an unprimeable number, because it can be changed into a prime (8000167687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42265 + ... + 133366.

It is an arithmetic number, because the mean of its divisors is an integer number (564305616).

Almost surely, 2^8000167681 is an apocalyptic number.

It is an amenable number.

8000167681 is a deficient number, since it is larger than the sum of its proper divisors (1028722175).

8000167681 is a wasteful number, since it uses less digits than its factorization.

8000167681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175784.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 8000167681 is about 89443.6564603662. The cubic root of 8000167681 is about 2000.0139733190.

Adding to 8000167681 its reverse (1867610008), we get a palindrome (9867777689).

The spelling of 8000167681 in words is "eight billion, one hundred sixty-seven thousand, six hundred eighty-one".