26904336661 has 8 divisors (see below), whose sum is σ = 28708305920. Its totient is φ = 25139162592.

The previous prime is 26904336647. The next prime is 26904336727. The reversal of 26904336661 is 16663340962.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26904336661 - 2³¹ = 24756853013 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 (26904316661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9697365 + ... + 9700138.

It is an arithmetic number, because the mean of its divisors is an integer number (3588538240).

Almost surely, 2^26904336661 is an apocalyptic number.

It is an amenable number.

26904336661 is a deficient number, since it is larger than the sum of its proper divisors (1803969259).

26904336661 is a wasteful number, since it uses less digits than its factorization.

26904336661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19397595.

The product of its (nonzero) digits is 839808, while the sum is 46.

The spelling of 26904336661 in words is "twenty-six billion, nine hundred four million, three hundred thirty-six thousand, six hundred sixty-one".