1166638258456 has 64 divisors (see below), whose sum is σ = 2498334451200. Its totient is φ = 505835433600.

The previous prime is 1166638258447. The next prime is 1166638258469. The reversal of 1166638258456 is 6548528366611.

It is a super-2 number, since 2×1166638258456² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1166638258394 and 1166638258403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2542080 + ... + 2965711.

It is an arithmetic number, because the mean of its divisors is an integer number (39036475800).

Almost surely, 2^{1166638258456} is an apocalyptic number.

It is an amenable number.

1166638258456 is an abundant number, since it is smaller than the sum of its proper divisors (1331696192744).

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

1166638258456 is a wasteful number, since it uses less digits than its factorization.

1166638258456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5507920 (or 5507916 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 61.

The spelling of 1166638258456 in words is "one trillion, one hundred sixty-six billion, six hundred thirty-eight million, two hundred fifty-eight thousand, four hundred fifty-six".