26786649667 has 4 divisors (see below), whose sum is σ = 26812937880. Its totient is φ = 26760361456.

The previous prime is 26786649629. The next prime is 26786649691. The reversal of 26786649667 is 76694668762.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26786649667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26786649067) by changing a digit.

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, 13142578 + ... + 13144615.

It is an arithmetic number, because the mean of its divisors is an integer number (6703234470).

Almost surely, 2^26786649667 is an apocalyptic number.

26786649667 is a deficient number, since it is larger than the sum of its proper divisors (26288213).

26786649667 is a wasteful number, since it uses less digits than its factorization.

26786649667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26288212.

The product of its digits is 219469824, while the sum is 67.

The spelling of 26786649667 in words is "twenty-six billion, seven hundred eighty-six million, six hundred forty-nine thousand, six hundred sixty-seven".