26378663 has 2 divisors, whose sum is σ = 26378664. Its totient is φ = 26378662.

The previous prime is 26378659. The next prime is 26378687. The reversal of 26378663 is 36687362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26378663 - 2² = 26378659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26378663.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26378563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13189331 + 13189332.

It is an arithmetic number, because the mean of its divisors is an integer number (13189332).

Almost surely, 2^26378663 is an apocalyptic number.

26378663 is a deficient number, since it is larger than the sum of its proper divisors (1).

26378663 is an equidigital number, since it uses as much as digits as its factorization.

26378663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 41.

The square root of 26378663 is about 5136.0162577624. The cubic root of 26378663 is about 297.6808701714.

The spelling of 26378663 in words is "twenty-six million, three hundred seventy-eight thousand, six hundred sixty-three".