2660136666444 has 36 divisors (see below), whose sum is σ = 6725701980816. Its totient is φ = 886518688608.

The previous prime is 2660136666427. The next prime is 2660136666521. The reversal of 2660136666444 is 4446666310662.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 7896619 + ... + 8226594.

Almost surely, 2^{2660136666444} is an apocalyptic number.

It is an amenable number.

2660136666444 is an abundant number, since it is smaller than the sum of its proper divisors (4065565314372).

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

2660136666444 is a wasteful number, since it uses less digits than its factorization.

2660136666444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16127806 (or 16127801 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 54.

The spelling of 2660136666444 in words is "two trillion, six hundred sixty billion, one hundred thirty-six million, six hundred sixty-six thousand, four hundred forty-four".