26664422401 has 4 divisors (see below), whose sum is σ = 26696901204. Its totient is φ = 26631943600.

The previous prime is 26664422371. The next prime is 26664422413. The reversal of 26664422401 is 10422446662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15431602176 + 11232820225 = 124224^2 + 105985^2 .

It is a cyclic number.

It is not a de Polignac number, because 26664422401 - 2¹¹ = 26664420353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26664422501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16238170 + ... + 16239811.

It is an arithmetic number, because the mean of its divisors is an integer number (6674225301).

Almost surely, 2^26664422401 is an apocalyptic number.

It is an amenable number.

26664422401 is a deficient number, since it is larger than the sum of its proper divisors (32478803).

26664422401 is an equidigital number, since it uses as much as digits as its factorization.

26664422401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32478802.

The product of its (nonzero) digits is 110592, while the sum is 37.

The spelling of 26664422401 in words is "twenty-six billion, six hundred sixty-four million, four hundred twenty-two thousand, four hundred one".