880685406221 has 2 divisors, whose sum is σ = 880685406222. Its totient is φ = 880685406220.

The previous prime is 880685406203. The next prime is 880685406233. The reversal of 880685406221 is 122604586088.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 654989150596 + 225696255625 = 809314^2 + 475075^2 .

It is a cyclic number.

It is not a de Polignac number, because 880685406221 - 2¹⁸ = 880685144077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 880685406221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (880685406421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 440342703110 + 440342703111.

It is an arithmetic number, because the mean of its divisors is an integer number (440342703111).

Almost surely, 2^880685406221 is an apocalyptic number.

It is an amenable number.

880685406221 is a deficient number, since it is larger than the sum of its proper divisors (1).

880685406221 is an equidigital number, since it uses as much as digits as its factorization.

880685406221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1474560, while the sum is 50.

The spelling of 880685406221 in words is "eight hundred eighty billion, six hundred eighty-five million, four hundred six thousand, two hundred twenty-one".