1166556370 has 64 divisors (see below), whose sum is σ = 2442825216. Its totient is φ = 392855040.

The previous prime is 1166556361. The next prime is 1166556373. The reversal of 1166556370 is 736556611.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1166556373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 987180 + ... + 988360.

It is an arithmetic number, because the mean of its divisors is an integer number (38169144).

Almost surely, 2^1166556370 is an apocalyptic number.

1166556370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1166556370 is an abundant number, since it is smaller than the sum of its proper divisors (1276268846).

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

1166556370 is a wasteful number, since it uses less digits than its factorization.

1166556370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 1166556370 is about 34154.8879371606. The cubic root of 1166556370 is about 1052.6934236396.

The spelling of 1166556370 in words is "one billion, one hundred sixty-six million, five hundred fifty-six thousand, three hundred seventy".