1166387858 has 16 divisors (see below), whose sum is σ = 1800719424. Its totient is φ = 566393520.

The previous prime is 1166387851. The next prime is 1166387881. The reversal of 1166387858 is 8587836611.

It is not an unprimeable number, because it can be changed into a prime (1166387851) 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 7 ways as a sum of consecutive naturals, for example, 51785 + ... + 70812.

It is an arithmetic number, because the mean of its divisors is an integer number (112544964).

Almost surely, 2^1166387858 is an apocalyptic number.

1166387858 is a deficient number, since it is larger than the sum of its proper divisors (634331566).

1166387858 is a wasteful number, since it uses less digits than its factorization.

1166387858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122737.

The product of its digits is 1935360, while the sum is 53.

The square root of 1166387858 is about 34152.4209683589. The cubic root of 1166387858 is about 1052.6427331284.

The spelling of 1166387858 in words is "one billion, one hundred sixty-six million, three hundred eighty-seven thousand, eight hundred fifty-eight".