1166642386 has 32 divisors (see below), whose sum is σ = 2247452928. Its totient is φ = 441460800.

The previous prime is 1166642383. The next prime is 1166642401. The reversal of 1166642386 is 6832466611.

It is a happy number.

It is a super-2 number, since 2×1166642386² = 2722108913623545992, which contains 22 as substring.

It is a Smith number, since the sum of its digits (43) 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 (1166642383) 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 15 ways as a sum of consecutive naturals, for example, 135165 + ... + 143536.

It is an arithmetic number, because the mean of its divisors is an integer number (70232904).

Almost surely, 2^1166642386 is an apocalyptic number.

1166642386 is a deficient number, since it is larger than the sum of its proper divisors (1080810542).

1166642386 is a wasteful number, since it uses less digits than its factorization.

1166642386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278746.

The product of its digits is 248832, while the sum is 43.

The square root of 1166642386 is about 34156.1471187838. The cubic root of 1166642386 is about 1052.7192964434.

The spelling of 1166642386 in words is "one billion, one hundred sixty-six million, six hundred forty-two thousand, three hundred eighty-six".