26664223 has 2 divisors, whose sum is σ = 26664224. Its totient is φ = 26664222.

The previous prime is 26664221. The next prime is 26664241. The reversal of 26664223 is 32246662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26664223 - 2¹ = 26664221 is a prime.

Together with 26664221, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26664221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13332111 + 13332112.

It is an arithmetic number, because the mean of its divisors is an integer number (13332112).

Almost surely, 2^26664223 is an apocalyptic number.

26664223 is a deficient number, since it is larger than the sum of its proper divisors (1).

26664223 is an equidigital number, since it uses as much as digits as its factorization.

26664223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 31.

The square root of 26664223 is about 5163.7411825149. The cubic root of 26664223 is about 298.7511902755.

It can be divided in two parts, 2666 and 4223, that added together give a square (6889 = 83²).

The spelling of 26664223 in words is "twenty-six million, six hundred sixty-four thousand, two hundred twenty-three".