1166655143 has 4 divisors (see below), whose sum is σ = 1174381488. Its totient is φ = 1158928800.

The previous prime is 1166655131. The next prime is 1166655163. The reversal of 1166655143 is 3415566611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1166655143 - 2¹⁸ = 1166392999 is a prime.

It is a super-2 number, since 2×1166655143² = 2722168445376700898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1166655097 and 1166655106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166655163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3862946 + ... + 3863247.

It is an arithmetic number, because the mean of its divisors is an integer number (293595372).

Almost surely, 2^1166655143 is an apocalyptic number.

1166655143 is a deficient number, since it is larger than the sum of its proper divisors (7726345).

1166655143 is an equidigital number, since it uses as much as digits as its factorization.

1166655143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7726344.

The product of its digits is 64800, while the sum is 38.

The square root of 1166655143 is about 34156.3338635750. Note that the first 3 decimals coincide. The cubic root of 1166655143 is about 1052.7231335207.

The spelling of 1166655143 in words is "one billion, one hundred sixty-six million, six hundred fifty-five thousand, one hundred forty-three".