1667047667 has 2 divisors, whose sum is σ = 1667047668. Its totient is φ = 1667047666.

The previous prime is 1667047609. The next prime is 1667047699. The reversal of 1667047667 is 7667407661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1667047667 - 2¹² = 1667043571 is a prime.

It is not a weakly prime, because it can be changed into another prime (1667047867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 833523833 + 833523834.

It is an arithmetic number, because the mean of its divisors is an integer number (833523834).

Almost surely, 2^1667047667 is an apocalyptic number.

1667047667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1667047667 is an equidigital number, since it uses as much as digits as its factorization.

1667047667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1778112, while the sum is 50.

The square root of 1667047667 is about 40829.4950617810. The cubic root of 1667047667 is about 1185.7214397822.

The spelling of 1667047667 in words is "one billion, six hundred sixty-seven million, forty-seven thousand, six hundred sixty-seven".