26664487 has 2 divisors, whose sum is σ = 26664488. Its totient is φ = 26664486.

The previous prime is 26664479. The next prime is 26664499. The reversal of 26664487 is 78446662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26664487 - 2³ = 26664479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26664587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13332243 + 13332244.

It is an arithmetic number, because the mean of its divisors is an integer number (13332244).

Almost surely, 2^26664487 is an apocalyptic number.

26664487 is a deficient number, since it is larger than the sum of its proper divisors (1).

26664487 is an equidigital number, since it uses as much as digits as its factorization.

26664487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 43.

The square root of 26664487 is about 5163.7667453130. The cubic root of 26664487 is about 298.7521762416.

The spelling of 26664487 in words is "twenty-six million, six hundred sixty-four thousand, four hundred eighty-seven".