26776387668 has 12 divisors (see below), whose sum is σ = 62478237920. Its totient is φ = 8925462552.

The previous prime is 26776387657. The next prime is 26776387681. The reversal of 26776387668 is 86678367762.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 26776387599 and 26776387608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1115682808 + ... + 1115682831.

Almost surely, 2^26776387668 is an apocalyptic number.

It is an amenable number.

26776387668 is an abundant number, since it is smaller than the sum of its proper divisors (35701850252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26776387668 is a wasteful number, since it uses less digits than its factorization.

26776387668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231365646 (or 2231365644 counting only the distinct ones).

The product of its digits is 170698752, while the sum is 66.

The spelling of 26776387668 in words is "twenty-six billion, seven hundred seventy-six million, three hundred eighty-seven thousand, six hundred sixty-eight".