26992332661 has 4 divisors (see below), whose sum is σ = 30848380192. Its totient is φ = 23136285132.

The previous prime is 26992332659. The next prime is 26992332673. The reversal of 26992332661 is 16623329962.

It is a happy number.

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 not a de Polignac number, because 26992332661 - 2¹ = 26992332659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26992332161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1928023755 + ... + 1928023768.

It is an arithmetic number, because the mean of its divisors is an integer number (7712095048).

Almost surely, 2^26992332661 is an apocalyptic number.

It is an amenable number.

26992332661 is a deficient number, since it is larger than the sum of its proper divisors (3856047531).

26992332661 is an equidigital number, since it uses as much as digits as its factorization.

26992332661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3856047530.

The product of its digits is 1259712, while the sum is 49.

The spelling of 26992332661 in words is "twenty-six billion, nine hundred ninety-two million, three hundred thirty-two thousand, six hundred sixty-one".