26421663 has 16 divisors (see below), whose sum is σ = 36548096. Its totient is φ = 16964640.

The previous prime is 26421649. The next prime is 26421667. The reversal of 26421663 is 36612462.

It is not a de Polignac number, because 26421663 - 2⁶ = 26421599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26421663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26421667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10278 + ... + 12588.

It is an arithmetic number, because the mean of its divisors is an integer number (2284256).

Almost surely, 2^26421663 is an apocalyptic number.

26421663 is a deficient number, since it is larger than the sum of its proper divisors (10126433).

26421663 is a wasteful number, since it uses less digits than its factorization.

26421663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2454.

The product of its digits is 10368, while the sum is 30.

The square root of 26421663 is about 5140.2006770164. The cubic root of 26421663 is about 297.8425327551.

The spelling of 26421663 in words is "twenty-six million, four hundred twenty-one thousand, six hundred sixty-three".