1166664739 has 4 divisors (see below), whose sum is σ = 1168984656. Its totient is φ = 1164344824.

The previous prime is 1166664731. The next prime is 1166664749. The reversal of 1166664739 is 9374666611.

It is a happy number.

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 1166664739 - 2³ = 1166664731 is a prime.

It is a super-2 number, since 2×1166664739² = 2722213226451876242, 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 = 1166664692 and 1166664701.

It is not an unprimeable number, because it can be changed into a prime (1166664731) 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 3 ways as a sum of consecutive naturals, for example, 1159204 + ... + 1160209.

It is an arithmetic number, because the mean of its divisors is an integer number (292246164).

Almost surely, 2^1166664739 is an apocalyptic number.

1166664739 is a deficient number, since it is larger than the sum of its proper divisors (2319917).

1166664739 is an equidigital number, since it uses as much as digits as its factorization.

1166664739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319916.

The product of its digits is 979776, while the sum is 49.

The square root of 1166664739 is about 34156.4743350364. The cubic root of 1166664739 is about 1052.7260198074.

The spelling of 1166664739 in words is "one billion, one hundred sixty-six million, six hundred sixty-four thousand, seven hundred thirty-nine".