667445073811 has 2 divisors, whose sum is σ = 667445073812. Its totient is φ = 667445073810.

The previous prime is 667445073731. The next prime is 667445073901. The reversal of 667445073811 is 118370544766.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667445073811 - 2⁷ = 667445073683 is a prime.

It is not a weakly prime, because it can be changed into another prime (667445073511) 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, 333722536905 + 333722536906.

It is an arithmetic number, because the mean of its divisors is an integer number (333722536906).

Almost surely, 2^667445073811 is an apocalyptic number.

667445073811 is a deficient number, since it is larger than the sum of its proper divisors (1).

667445073811 is an equidigital number, since it uses as much as digits as its factorization.

667445073811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 667445073811 in words is "six hundred sixty-seven billion, four hundred forty-five million, seventy-three thousand, eight hundred eleven".