4387091665 has 32 divisors (see below), whose sum is σ = 5924928384. Its totient is φ = 3090378240.

The previous prime is 4387091647. The next prime is 4387091701. The reversal of 4387091665 is 5661907834.

It is not a de Polignac number, because 4387091665 - 2⁷ = 4387091537 is a prime.

It is a super-2 number, since 2×4387091665² = 38493146554224944450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 457197 + ... + 466693.

It is an arithmetic number, because the mean of its divisors is an integer number (185154012).

Almost surely, 2^4387091665 is an apocalyptic number.

It is an amenable number.

4387091665 is a deficient number, since it is larger than the sum of its proper divisors (1537836719).

4387091665 is a wasteful number, since it uses less digits than its factorization.

4387091665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9777.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The square root of 4387091665 is about 66235.1241034544. The cubic root of 4387091665 is about 1637.0385362453.

The spelling of 4387091665 in words is "four billion, three hundred eighty-seven million, ninety-one thousand, six hundred sixty-five".