6651065 has 4 divisors (see below), whose sum is σ = 7981284. Its totient is φ = 5320848.

The previous prime is 6651053. The next prime is 6651077. The reversal of 6651065 is 5601566.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5601566 = 2 ⋅2800783.

It is an interprime number because it is at equal distance from previous prime (6651053) and next prime (6651077).

It can be written as a sum of positive squares in 2 ways, for example, as 3396649 + 3254416 = 1843^2 + 1804^2 .

It is a cyclic number.

It is not a de Polignac number, because 6651065 - 2⁴ = 6651049 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, 665102 + ... + 665111.

It is an arithmetic number, because the mean of its divisors is an integer number (1995321).

Almost surely, 2^6651065 is an apocalyptic number.

It is an amenable number.

6651065 is a deficient number, since it is larger than the sum of its proper divisors (1330219).

6651065 is a wasteful number, since it uses less digits than its factorization.

6651065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330218.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 6651065 is about 2578.9658780217. The cubic root of 6651065 is about 188.0602737929.

The spelling of 6651065 in words is "six million, six hundred fifty-one thousand, sixty-five".