667666733807 has 2 divisors, whose sum is σ = 667666733808. Its totient is φ = 667666733806.

The previous prime is 667666733711. The next prime is 667666733837. The reversal of 667666733807 is 708337666766.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667666733807 - 2⁸ = 667666733551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667666733837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333833366903 + 333833366904.

It is an arithmetic number, because the mean of its divisors is an integer number (333833366904).

Almost surely, 2^667666733807 is an apocalyptic number.

667666733807 is a deficient number, since it is larger than the sum of its proper divisors (1).

667666733807 is an equidigital number, since it uses as much as digits as its factorization.

667666733807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192036096, while the sum is 65.

The spelling of 667666733807 in words is "six hundred sixty-seven billion, six hundred sixty-six million, seven hundred thirty-three thousand, eight hundred seven".