11966458212 has 72 divisors (see below), whose sum is σ = 31401918912. Its totient is φ = 3984616800.

The previous prime is 11966458187. The next prime is 11966458223. The reversal of 11966458212 is 21285466911.

11966458212 is a `hidden beast` number, since 1 + 1 + 9 + 6 + 64 + 582 + 1 + 2 = 666.

It is a super-2 number, since 2×11966458212² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 996162 + ... + 1008102.

Almost surely, 2^11966458212 is an apocalyptic number.

11966458212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11966458212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15700959456).

11966458212 is an abundant number, since it is smaller than the sum of its proper divisors (19435460700).

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

11966458212 is a wasteful number, since it uses less digits than its factorization.

11966458212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12991 (or 12977 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The spelling of 11966458212 in words is "eleven billion, nine hundred sixty-six million, four hundred fifty-eight thousand, two hundred twelve".