65961297 has 10 divisors (see below), whose sum is σ = 98534898. Its totient is φ = 43974144.

The previous prime is 65961289. The next prime is 65961317. The reversal of 65961297 is 79216956.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 61449921 + 4511376 = 7839^2 + 2124^2 .

It is not a de Polignac number, because 65961297 - 2³ = 65961289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65961697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 407088 + ... + 407249.

Almost surely, 2^65961297 is an apocalyptic number.

It is an amenable number.

65961297 is a deficient number, since it is larger than the sum of its proper divisors (32573601).

65961297 is an equidigital number, since it uses as much as digits as its factorization.

65961297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814349 (or 814340 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 65961297 is about 8121.6560503385. The cubic root of 65961297 is about 404.0449926200.

The spelling of 65961297 in words is "sixty-five million, nine hundred sixty-one thousand, two hundred ninety-seven".