1166724643 has 6 divisors (see below), whose sum is σ = 1357210356. Its totient is φ = 1000049652.

The previous prime is 1166724571. The next prime is 1166724701. The reversal of 1166724643 is 3464276611.

It is a de Polignac number, because none of the positive numbers 2^k-1166724643 is a prime.

It is a super-2 number, since 2×1166724643² = 2722492785166954898, 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 = 1166724596 and 1166724605.

It is not an unprimeable number, because it can be changed into a prime (1166721643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11905305 + ... + 11905402.

It is an arithmetic number, because the mean of its divisors is an integer number (226201726).

Almost surely, 2^1166724643 is an apocalyptic number.

1166724643 is a deficient number, since it is larger than the sum of its proper divisors (190485713).

1166724643 is an equidigital number, since it uses as much as digits as its factorization.

1166724643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23810721 (or 23810714 counting only the distinct ones).

The product of its digits is 145152, while the sum is 40.

The square root of 1166724643 is about 34157.3512292742. The cubic root of 1166724643 is about 1052.7440373858.

The spelling of 1166724643 in words is "one billion, one hundred sixty-six million, seven hundred twenty-four thousand, six hundred forty-three".