667222277801 has 2 divisors, whose sum is σ = 667222277802. Its totient is φ = 667222277800.

The previous prime is 667222277783. The next prime is 667222277831. The reversal of 667222277801 is 108772222766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 604271467801 + 62950810000 = 777349^2 + 250900^2 .

It is a cyclic number.

It is not a de Polignac number, because 667222277801 - 2³⁰ = 666148535977 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 667222277801.

It is not a weakly prime, because it can be changed into another prime (667222277831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333611138900 + 333611138901.

It is an arithmetic number, because the mean of its divisors is an integer number (333611138901).

Almost surely, 2^667222277801 is an apocalyptic number.

It is an amenable number.

667222277801 is a deficient number, since it is larger than the sum of its proper divisors (1).

667222277801 is an equidigital number, since it uses as much as digits as its factorization.

667222277801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1580544, while the sum is 50.

The spelling of 667222277801 in words is "six hundred sixty-seven billion, two hundred twenty-two million, two hundred seventy-seven thousand, eight hundred one".