11666356004820 has 48 divisors (see below), whose sum is σ = 35635414707648. Its totient is φ = 2828207516160.

The previous prime is 11666356004819. The next prime is 11666356004833. The reversal of 11666356004820 is 2840065366611.

It is a super-2 number, since 2×11666356004820² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11666356004820.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8838147829 + ... + 8838149148.

It is an arithmetic number, because the mean of its divisors is an integer number (742404473076).

Almost surely, 2^{11666356004820} is an apocalyptic number.

11666356004820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11666356004820 is an abundant number, since it is smaller than the sum of its proper divisors (23969058702828).

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

11666356004820 is a wasteful number, since it uses less digits than its factorization.

11666356004820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17676297000 (or 17676296998 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 11666356004820 in words is "eleven trillion, six hundred sixty-six billion, three hundred fifty-six million, four thousand, eight hundred twenty".