11666438399484 has 768 divisors, whose sum is σ = 35713595473920. Its totient is φ = 3259854720000.

The previous prime is 11666438399479. The next prime is 11666438399489. The reversal of 11666438399484 is 48499383466611.

It is an interprime number because it is at equal distance from previous prime (11666438399479) and next prime (11666438399489).

It is a super-2 number, since 2×11666438399484² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11666438399489) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 14175501897 + ... + 14175502719.

It is an arithmetic number, because the mean of its divisors is an integer number (46502077440).

Almost surely, 2^{11666438399484} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11666438399484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17856797736960).

11666438399484 is an abundant number, since it is smaller than the sum of its proper divisors (24047157074436).

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

11666438399484 is a wasteful number, since it uses less digits than its factorization.

11666438399484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119 (or 1111 counting only the distinct ones).

The product of its digits is 644972544, while the sum is 72.

The spelling of 11666438399484 in words is "eleven trillion, six hundred sixty-six billion, four hundred thirty-eight million, three hundred ninety-nine thousand, four hundred eighty-four".