222772241377661 has 2 divisors, whose sum is σ = 222772241377662. Its totient is φ = 222772241377660.

The previous prime is 222772241377619. The next prime is 222772241377709. The reversal of 222772241377661 is 166773142277222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148405850653636 + 74366390724025 = 12182194^2 + 8623595^2 .

It is a cyclic number.

It is not a de Polignac number, because 222772241377661 - 2¹⁰ = 222772241376637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 222772241377661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222772241377601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111386120688830 + 111386120688831.

It is an arithmetic number, because the mean of its divisors is an integer number (111386120688831).

Almost surely, 2^{222772241377661} is an apocalyptic number.

It is an amenable number.

222772241377661 is a deficient number, since it is larger than the sum of its proper divisors (1).

222772241377661 is an equidigital number, since it uses as much as digits as its factorization.

222772241377661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33191424, while the sum is 59.

The spelling of 222772241377661 in words is "two hundred twenty-two trillion, seven hundred seventy-two billion, two hundred forty-one million, three hundred seventy-seven thousand, six hundred sixty-one".