6651265 has 4 divisors (see below), whose sum is σ = 7981524. Its totient is φ = 5321008.

The previous prime is 6651251. The next prime is 6651277. The reversal of 6651265 is 5621566.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1048576 + 5602689 = 1024^2 + 2367^2 .

It is a cyclic number.

It is not a de Polignac number, because 6651265 - 2¹⁵ = 6618497 is a prime.

It is a super-2 number, since 2×6651265² = 88478652200450, which contains 22 as substring.

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, 665122 + ... + 665131.

It is an arithmetic number, because the mean of its divisors is an integer number (1995381).

Almost surely, 2^6651265 is an apocalyptic number.

It is an amenable number.

6651265 is a deficient number, since it is larger than the sum of its proper divisors (1330259).

6651265 is a wasteful number, since it uses less digits than its factorization.

6651265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330258.

The product of its digits is 10800, while the sum is 31.

The square root of 6651265 is about 2579.0046529621. The cubic root of 6651265 is about 188.0621587881.

The spelling of 6651265 in words is "six million, six hundred fifty-one thousand, two hundred sixty-five".