65651265 has 24 divisors (see below), whose sum is σ = 113998248. Its totient is φ = 34951680.

The previous prime is 65651237. The next prime is 65651279. The reversal of 65651265 is 56215656.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2782224 + 62869041 = 1668^2 + 7929^2 .

It is not a de Polignac number, because 65651265 - 2⁵ = 65651233 is a prime.

It is a super-2 number, since 2×65651265² = 8620177192200450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36057 + ... + 37833.

It is an arithmetic number, because the mean of its divisors is an integer number (4749927).

Almost surely, 2^65651265 is an apocalyptic number.

It is an amenable number.

65651265 is a deficient number, since it is larger than the sum of its proper divisors (48346983).

65651265 is a wasteful number, since it uses less digits than its factorization.

65651265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609 (or 2606 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 65651265 is about 8102.5468218332. The cubic root of 65651265 is about 403.4109660156.

The spelling of 65651265 in words is "sixty-five million, six hundred fifty-one thousand, two hundred sixty-five".