1166542210620 has 48 divisors (see below), whose sum is σ = 3629242434720. Its totient is φ = 311077922688.

The previous prime is 1166542210583. The next prime is 1166542210633. The reversal of 1166542210620 is 260122456611.

1166542210620 is a `hidden beast` number, since 1 + 1 + 6 + 6 + 5 + 4 + 2 + 21 + 0 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1080131137 + ... + 1080132216.

It is an arithmetic number, because the mean of its divisors is an integer number (75609217390).

Almost surely, 2^{1166542210620} is an apocalyptic number.

1166542210620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1166542210620 is an abundant number, since it is smaller than the sum of its proper divisors (2462700224100).

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

1166542210620 is a wasteful number, since it uses less digits than its factorization.

1166542210620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160263371 (or 2160263363 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 1166542210620 in words is "one trillion, one hundred sixty-six billion, five hundred forty-two million, two hundred ten thousand, six hundred twenty".