26642663 has 2 divisors, whose sum is σ = 26642664. Its totient is φ = 26642662.

The previous prime is 26642653. The next prime is 26642683. The reversal of 26642663 is 36624662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26642663 - 2⁶ = 26642599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26642653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13321331 + 13321332.

It is an arithmetic number, because the mean of its divisors is an integer number (13321332).

Almost surely, 2^26642663 is an apocalyptic number.

26642663 is a deficient number, since it is larger than the sum of its proper divisors (1).

26642663 is an equidigital number, since it uses as much as digits as its factorization.

26642663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 35.

The square root of 26642663 is about 5161.6531266640. The cubic root of 26642663 is about 298.6706477389.

The spelling of 26642663 in words is "twenty-six million, six hundred forty-two thousand, six hundred sixty-three".