26641663 has 2 divisors, whose sum is σ = 26641664. Its totient is φ = 26641662.

The previous prime is 26641661. The next prime is 26641687. The reversal of 26641663 is 36614662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26641663 - 2¹ = 26641661 is a prime.

Together with 26641661, 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 (26641661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13320831 + 13320832.

It is an arithmetic number, because the mean of its divisors is an integer number (13320832).

Almost surely, 2^26641663 is an apocalyptic number.

26641663 is a deficient number, since it is larger than the sum of its proper divisors (1).

26641663 is an equidigital number, since it uses as much as digits as its factorization.

26641663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 34.

The square root of 26641663 is about 5161.5562575642. The cubic root of 26641663 is about 298.6669109455. Note that the first 3 decimals are identical.

The spelling of 26641663 in words is "twenty-six million, six hundred forty-one thousand, six hundred sixty-three".