6650065 has 8 divisors (see below), whose sum is σ = 7996968. Its totient is φ = 5308800.

The previous prime is 6650051. The next prime is 6650071. The reversal of 6650065 is 5600566.

It can be written as a sum of positive squares in 4 ways, for example, as 3814209 + 2835856 = 1953^2 + 1684^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-6650065 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1899 + ... + 4111.

It is an arithmetic number, because the mean of its divisors is an integer number (999621).

Almost surely, 2^6650065 is an apocalyptic number.

It is an amenable number.

6650065 is a deficient number, since it is larger than the sum of its proper divisors (1346903).

6650065 is a wasteful number, since it uses less digits than its factorization.

6650065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819.

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 6650065 is about 2578.7719945742. The cubic root of 6650065 is about 188.0508482498.

The spelling of 6650065 in words is "six million, six hundred fifty thousand, sixty-five".