26664421 has 8 divisors (see below), whose sum is σ = 30546560. Its totient is φ = 22800528.

The previous prime is 26664419. The next prime is 26664431. The reversal of 26664421 is 12446662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26664421 - 2¹ = 26664419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26664431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1266 + ... + 7411.

It is an arithmetic number, because the mean of its divisors is an integer number (3818320).

Almost surely, 2^26664421 is an apocalyptic number.

It is an amenable number.

26664421 is a deficient number, since it is larger than the sum of its proper divisors (3882139).

26664421 is an equidigital number, since it uses as much as digits as its factorization.

26664421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9123.

The product of its digits is 13824, while the sum is 31.

The square root of 26664421 is about 5163.7603546253. The cubic root of 26664421 is about 298.7519297507.

The spelling of 26664421 in words is "twenty-six million, six hundred sixty-four thousand, four hundred twenty-one".