1166543658 has 48 divisors (see below), whose sum is σ = 2890532736. Its totient is φ = 333073440.

The previous prime is 1166543611. The next prime is 1166543663. The reversal of 1166543658 is 8563456611.

1166543658 is a `hidden beast` number, since 1 + 166 + 5 + 436 + 58 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 303388 + ... + 307208.

It is an arithmetic number, because the mean of its divisors is an integer number (60219432).

Almost surely, 2^1166543658 is an apocalyptic number.

1166543658 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1166543658 is an abundant number, since it is smaller than the sum of its proper divisors (1723989078).

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

1166543658 is a wasteful number, since it uses less digits than its factorization.

1166543658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6259 (or 6256 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 1166543658 is about 34154.7018432309. The cubic root of 1166543658 is about 1052.6895998817.

The spelling of 1166543658 in words is "one billion, one hundred sixty-six million, five hundred forty-three thousand, six hundred fifty-eight".