6650015165 has 4 divisors (see below), whose sum is σ = 7980018204. Its totient is φ = 5320012128.

The previous prime is 6650015159. The next prime is 6650015173. The reversal of 6650015165 is 5615100566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5615100566 = 2 ⋅2807550283.

It can be written as a sum of positive squares in 2 ways, for example, as 1773925924 + 4876089241 = 42118^2 + 69829^2 .

It is a cyclic number.

It is not a de Polignac number, because 6650015165 - 2¹⁴ = 6649998781 is a prime.

It is a Duffinian 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, 665001512 + ... + 665001521.

It is an arithmetic number, because the mean of its divisors is an integer number (1995004551).

Almost surely, 2^6650015165 is an apocalyptic number.

It is an amenable number.

6650015165 is a deficient number, since it is larger than the sum of its proper divisors (1330003039).

6650015165 is a wasteful number, since it uses less digits than its factorization.

6650015165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330003038.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 6650015165 is about 81547.6251340283. The cubic root of 6650015165 is about 1880.5037850313.

The spelling of 6650015165 in words is "six billion, six hundred fifty million, fifteen thousand, one hundred sixty-five".