8000066731 has 2 divisors, whose sum is σ = 8000066732. Its totient is φ = 8000066730.

The previous prime is 8000066713. The next prime is 8000066807. The reversal of 8000066731 is 1376600008.

Together with previous prime (8000066713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8000066731 - 2⁵ = 8000066699 is a prime.

It is a super-2 number, since 2×8000066731² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8000066693 and 8000066702.

It is not a weakly prime, because it can be changed into another prime (8000066231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4000033365 + 4000033366.

It is an arithmetic number, because the mean of its divisors is an integer number (4000033366).

Almost surely, 2^8000066731 is an apocalyptic number.

8000066731 is a deficient number, since it is larger than the sum of its proper divisors (1).

8000066731 is an equidigital number, since it uses as much as digits as its factorization.

8000066731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 8000066731 is about 89443.0921368442. The cubic root of 8000066731 is about 2000.0055609012.

Adding to 8000066731 its reverse (1376600008), we get a palindrome (9376666739).

The spelling of 8000066731 in words is "eight billion, sixty-six thousand, seven hundred thirty-one".