11644554666 has 32 divisors (see below), whose sum is σ = 23451487488. Its totient is φ = 3854485440.

The previous prime is 11644554659. The next prime is 11644554673. The reversal of 11644554666 is 66645544611.

11644554666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11644554659) and next prime (11644554673).

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 15 ways as a sum of consecutive naturals, for example, 2393076 + ... + 2397936.

It is an arithmetic number, because the mean of its divisors is an integer number (732858984).

Almost surely, 2^11644554666 is an apocalyptic number.

11644554666 is an abundant number, since it is smaller than the sum of its proper divisors (11806932822).

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

11644554666 is a wasteful number, since it uses less digits than its factorization.

11644554666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7566.

The product of its digits is 2073600, while the sum is 48.

The spelling of 11644554666 in words is "eleven billion, six hundred forty-four million, five hundred fifty-four thousand, six hundred sixty-six".