23355666666889 has 2 divisors, whose sum is σ = 23355666666890. Its totient is φ = 23355666666888.

The previous prime is 23355666666841. The next prime is 23355666666949. The reversal of 23355666666889 is 98866666655332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18225283115664 + 5130383551225 = 4269108^2 + 2265035^2 .

It is a cyclic number.

It is not a de Polignac number, because 23355666666889 - 2²¹ = 23355664569737 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (23355666666089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11677833333444 + 11677833333445.

It is an arithmetic number, because the mean of its divisors is an integer number (11677833333445).

Almost surely, 2^{23355666666889} is an apocalyptic number.

It is an amenable number.

23355666666889 is a deficient number, since it is larger than the sum of its proper divisors (1).

23355666666889 is an equidigital number, since it uses as much as digits as its factorization.

23355666666889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12093235200, while the sum is 79.

The spelling of 23355666666889 in words is "twenty-three trillion, three hundred fifty-five billion, six hundred sixty-six million, six hundred sixty-six thousand, eight hundred eighty-nine".