1167995665 has 4 divisors (see below), whose sum is σ = 1401594804. Its totient is φ = 934396528.

The previous prime is 1167995639. The next prime is 1167995723. The reversal of 1167995665 is 5665997611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5665997611 = 61141 ⋅92671.

It can be written as a sum of positive squares in 2 ways, for example, as 704583936 + 463411729 = 26544^2 + 21527^2 .

It is a cyclic number.

It is not a de Polignac number, because 1167995665 - 2⁷ = 1167995537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116799562 + ... + 116799571.

It is an arithmetic number, because the mean of its divisors is an integer number (350398701).

Almost surely, 2^1167995665 is an apocalyptic number.

It is an amenable number.

1167995665 is a deficient number, since it is larger than the sum of its proper divisors (233599139).

1167995665 is an equidigital number, since it uses as much as digits as its factorization.

1167995665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233599138.

The product of its digits is 3061800, while the sum is 55.

The square root of 1167995665 is about 34175.9515595396. The cubic root of 1167995665 is about 1053.1261827481.

The spelling of 1167995665 in words is "one billion, one hundred sixty-seven million, nine hundred ninety-five thousand, six hundred sixty-five".