26651314661 has 4 divisors (see below), whose sum is σ = 26655552000. Its totient is φ = 26647077324.

The previous prime is 26651314639. The next prime is 26651314693. The reversal of 26651314661 is 16641315662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26651314661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26651314061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2109221 + ... + 2121818.

It is an arithmetic number, because the mean of its divisors is an integer number (6663888000).

Almost surely, 2^26651314661 is an apocalyptic number.

It is an amenable number.

26651314661 is a deficient number, since it is larger than the sum of its proper divisors (4237339).

26651314661 is an equidigital number, since it uses as much as digits as its factorization.

26651314661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4237338.

The product of its digits is 155520, while the sum is 41.

The spelling of 26651314661 in words is "twenty-six billion, six hundred fifty-one million, three hundred fourteen thousand, six hundred sixty-one".