660047867 has 2 divisors, whose sum is σ = 660047868. Its totient is φ = 660047866.

The previous prime is 660047819. The next prime is 660047873. The reversal of 660047867 is 768740066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 660047867 - 2⁸ = 660047611 is a prime.

It is not a weakly prime, because it can be changed into another prime (660044867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330023933 + 330023934.

It is an arithmetic number, because the mean of its divisors is an integer number (330023934).

Almost surely, 2^660047867 is an apocalyptic number.

660047867 is a deficient number, since it is larger than the sum of its proper divisors (1).

660047867 is an equidigital number, since it uses as much as digits as its factorization.

660047867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 660047867 is about 25691.3967506634. The cubic root of 660047867 is about 870.6798170041.

The spelling of 660047867 in words is "six hundred sixty million, forty-seven thousand, eight hundred sixty-seven".