667219224817 has 2 divisors, whose sum is σ = 667219224818. Its totient is φ = 667219224816.

The previous prime is 667219224809. The next prime is 667219224821. The reversal of 667219224817 is 718422912766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 574610996961 + 92608227856 = 758031^2 + 304316^2 .

It is a cyclic number.

It is not a de Polignac number, because 667219224817 - 2³ = 667219224809 is a prime.

It is not a weakly prime, because it can be changed into another prime (667219224827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333609612408 + 333609612409.

It is an arithmetic number, because the mean of its divisors is an integer number (333609612409).

Almost surely, 2^667219224817 is an apocalyptic number.

It is an amenable number.

667219224817 is a deficient number, since it is larger than the sum of its proper divisors (1).

667219224817 is an equidigital number, since it uses as much as digits as its factorization.

667219224817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 55.

The spelling of 667219224817 in words is "six hundred sixty-seven billion, two hundred nineteen million, two hundred twenty-four thousand, eight hundred seventeen".