26664326421 has 8 divisors (see below), whose sum is σ = 35556158400. Its totient is φ = 17774356032.

The previous prime is 26664326389. The next prime is 26664326431. The reversal of 26664326421 is 12462346662.

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

It is not a de Polignac number, because 26664326421 - 2⁵ = 26664326389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26664326431) 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, 431625 + ... + 489518.

It is an arithmetic number, because the mean of its divisors is an integer number (4444519800).

Almost surely, 2^26664326421 is an apocalyptic number.

It is an amenable number.

26664326421 is a deficient number, since it is larger than the sum of its proper divisors (8891831979).

26664326421 is an equidigital number, since it uses as much as digits as its factorization.

26664326421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930795.

The product of its digits is 497664, while the sum is 42.

The spelling of 26664326421 in words is "twenty-six billion, six hundred sixty-four million, three hundred twenty-six thousand, four hundred twenty-one".