11662993905558 has 32 divisors (see below), whose sum is σ = 24346100448000. Its totient is φ = 3717728352096.

The previous prime is 11662993905533. The next prime is 11662993905559. The reversal of 11662993905558 is 85550939926611.

It is a happy number.

It is a super-3 number, since 3×11662993905558³ (a number of 40 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11662993905492 and 11662993905501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11662993905559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9743493 + ... + 10874816.

It is an arithmetic number, because the mean of its divisors is an integer number (760815639000).

Almost surely, 2^{11662993905558} is an apocalyptic number.

11662993905558 is an abundant number, since it is smaller than the sum of its proper divisors (12683106542442).

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

11662993905558 is a wasteful number, since it uses less digits than its factorization.

11662993905558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20622436.

The product of its (nonzero) digits is 157464000, while the sum is 69.

The spelling of 11662993905558 in words is "eleven trillion, six hundred sixty-two billion, nine hundred ninety-three million, nine hundred five thousand, five hundred fifty-eight".