26253431666 has 16 divisors (see below), whose sum is σ = 49097327040. Its totient is φ = 10228609680.

The previous prime is 26253431647. The next prime is 26253431681. The reversal of 26253431666 is 66613435262.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85238261 + ... + 85238568.

It is an arithmetic number, because the mean of its divisors is an integer number (3068582940).

Almost surely, 2^26253431666 is an apocalyptic number.

26253431666 is a deficient number, since it is larger than the sum of its proper divisors (22843895374).

26253431666 is a wasteful number, since it uses less digits than its factorization.

26253431666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170476849.

The product of its digits is 933120, while the sum is 44.

The spelling of 26253431666 in words is "twenty-six billion, two hundred fifty-three million, four hundred thirty-one thousand, six hundred sixty-six".