1166660655500 has 48 divisors (see below), whose sum is σ = 2548986140064. Its totient is φ = 466481246400.

The previous prime is 1166660655491. The next prime is 1166660655529. The reversal of 1166660655500 is 55560666611.

It is a super-2 number, since 2×1166660655500² (a number of 25 digits) contains 22 as substring.

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, 822239 + ... + 1734761.

It is an arithmetic number, because the mean of its divisors is an integer number (53103877918).

Almost surely, 2^{1166660655500} is an apocalyptic number.

1166660655500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1166660655500 is an abundant number, since it is smaller than the sum of its proper divisors (1382325484564).

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

1166660655500 is a wasteful number, since it uses less digits than its factorization.

1166660655500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915099 (or 915087 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 1166660655500 in words is "one trillion, one hundred sixty-six billion, six hundred sixty million, six hundred fifty-five thousand, five hundred".