667422465893 has 2 divisors, whose sum is σ = 667422465894. Its totient is φ = 667422465892.

The previous prime is 667422465883. The next prime is 667422465947. The reversal of 667422465893 is 398564224766.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 661687887364 + 5734578529 = 813442^2 + 75727^2 .

It is a cyclic number.

It is not a de Polignac number, because 667422465893 - 2¹⁴ = 667422449509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667422465803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333711232946 + 333711232947.

It is an arithmetic number, because the mean of its divisors is an integer number (333711232947).

Almost surely, 2^667422465893 is an apocalyptic number.

It is an amenable number.

667422465893 is a deficient number, since it is larger than the sum of its proper divisors (1).

667422465893 is an equidigital number, since it uses as much as digits as its factorization.

667422465893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104509440, while the sum is 62.

The spelling of 667422465893 in words is "six hundred sixty-seven billion, four hundred twenty-two million, four hundred sixty-five thousand, eight hundred ninety-three".