11665404144666 has 32 divisors (see below), whose sum is σ = 25926024643200. Its totient is φ = 3888032400000.

The previous prime is 11665404144623. The next prime is 11665404144679. The reversal of 11665404144666 is 66644140456611.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11614710 + ... + 12579041.

It is an arithmetic number, because the mean of its divisors is an integer number (810188270100).

Almost surely, 2^{11665404144666} is an apocalyptic number.

11665404144666 is an abundant number, since it is smaller than the sum of its proper divisors (14260620498534).

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

11665404144666 is a wasteful number, since it uses less digits than its factorization.

11665404144666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24202691 (or 24202685 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 54.

The spelling of 11665404144666 in words is "eleven trillion, six hundred sixty-five billion, four hundred four million, one hundred forty-four thousand, six hundred sixty-six".