26400666244 has 18 divisors (see below), whose sum is σ = 46654150830. Its totient is φ = 13072153536.

The previous prime is 26400666233. The next prime is 26400666317. The reversal of 26400666244 is 44266600462.

It can be written as a sum of positive squares in only one way, i.e., 23237953600 + 3162712644 = 152440^2 + 56238^2 .

It is a junction number, because it is equal to n+sod(n) for n = 26400666197 and 26400666206.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 268629 + ... + 353500.

Almost surely, 2^26400666244 is an apocalyptic number.

It is an amenable number.

26400666244 is a deficient number, since it is larger than the sum of its proper divisors (20253484586).

26400666244 is a wasteful number, since it uses less digits than its factorization.

26400666244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622339 (or 622234 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 40.

The spelling of 26400666244 in words is "twenty-six billion, four hundred million, six hundred sixty-six thousand, two hundred forty-four".