6601847165 has 4 divisors (see below), whose sum is σ = 7922216604. Its totient is φ = 5281477728.

The previous prime is 6601847149. The next prime is 6601847191. The reversal of 6601847165 is 5617481066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5617481066 = 2 ⋅2808740533.

It can be written as a sum of positive squares in 2 ways, for example, as 3773522041 + 2828325124 = 61429^2 + 53182^2 .

It is a cyclic number.

It is not a de Polignac number, because 6601847165 - 2⁴ = 6601847149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent 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, 660184712 + ... + 660184721.

It is an arithmetic number, because the mean of its divisors is an integer number (1980554151).

Almost surely, 2^6601847165 is an apocalyptic number.

It is an amenable number.

6601847165 is a deficient number, since it is larger than the sum of its proper divisors (1320369439).

6601847165 is a wasteful number, since it uses less digits than its factorization.

6601847165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320369438.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 6601847165 is about 81251.7517657312. The cubic root of 6601847165 is about 1875.9524325018.

The spelling of 6601847165 in words is "six billion, six hundred one million, eight hundred forty-seven thousand, one hundred sixty-five".