11666212880 has 40 divisors (see below), whose sum is σ = 30998795712. Its totient is φ = 3999844224.

The previous prime is 11666212879. The next prime is 11666212913. The reversal of 11666212880 is 8821266611.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×11666212880³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10415702 + ... + 10416821.

Almost surely, 2^11666212880 is an apocalyptic number.

11666212880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11666212880 is an abundant number, since it is smaller than the sum of its proper divisors (19332582832).

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

11666212880 is a wasteful number, since it uses less digits than its factorization.

11666212880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20832543 (or 20832537 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The spelling of 11666212880 in words is "eleven billion, six hundred sixty-six million, two hundred twelve thousand, eight hundred eighty".