26778671 has 2 divisors, whose sum is σ = 26778672. Its totient is φ = 26778670.

The previous prime is 26778667. The next prime is 26778677. The reversal of 26778671 is 17687762.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26778671 - 2² = 26778667 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26778677) 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, 13389335 + 13389336.

It is an arithmetic number, because the mean of its divisors is an integer number (13389336).

Almost surely, 2^26778671 is an apocalyptic number.

26778671 is a deficient number, since it is larger than the sum of its proper divisors (1).

26778671 is an equidigital number, since it uses as much as digits as its factorization.

26778671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 197568, while the sum is 44.

The square root of 26778671 is about 5174.8112042856. The cubic root of 26778671 is about 299.1780128101.

Subtracting from 26778671 its reverse (17687762), we obtain a palindrome (9090909).

The spelling of 26778671 in words is "twenty-six million, seven hundred seventy-eight thousand, six hundred seventy-one".