222066636663257 has 2 divisors, whose sum is σ = 222066636663258. Its totient is φ = 222066636663256.

The previous prime is 222066636663239. The next prime is 222066636663433. The reversal of 222066636663257 is 752366636660222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132166960039321 + 89899676623936 = 11496389^2 + 9481544^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222066636663257 is a prime.

It is a super-4 number, since 4×222066636663257⁴ (a number of 58 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 222066636663257.

It is not a weakly prime, because it can be changed into another prime (222066636660257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111033318331628 + 111033318331629.

It is an arithmetic number, because the mean of its divisors is an integer number (111033318331629).

Almost surely, 2^{222066636663257} is an apocalyptic number.

It is an amenable number.

222066636663257 is a deficient number, since it is larger than the sum of its proper divisors (1).

222066636663257 is an equidigital number, since it uses as much as digits as its factorization.

222066636663257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 235146240, while the sum is 62.

The spelling of 222066636663257 in words is "two hundred twenty-two trillion, sixty-six billion, six hundred thirty-six million, six hundred sixty-three thousand, two hundred fifty-seven".