7667681731 has 2 divisors, whose sum is σ = 7667681732. Its totient is φ = 7667681730.

The previous prime is 7667681719. The next prime is 7667681779. The reversal of 7667681731 is 1371867667.

7667681731 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7667681731 - 2¹¹ = 7667679683 is a prime.

It is a super-2 number, since 2×7667681731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7667601731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3833840865 + 3833840866.

It is an arithmetic number, because the mean of its divisors is an integer number (3833840866).

Almost surely, 2^7667681731 is an apocalyptic number.

7667681731 is a deficient number, since it is larger than the sum of its proper divisors (1).

7667681731 is an equidigital number, since it uses as much as digits as its factorization.

7667681731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 52.

The square root of 7667681731 is about 87565.2998110553. The cubic root of 7667681731 is about 1971.9142525018.

The spelling of 7667681731 in words is "seven billion, six hundred sixty-seven million, six hundred eighty-one thousand, seven hundred thirty-one".