65617253 has 8 divisors (see below), whose sum is σ = 70834008. Its totient is φ = 60424704.

The previous prime is 65617249. The next prime is 65617271. The reversal of 65617253 is 35271656.

It can be written as a sum of positive squares in 4 ways, for example, as 605284 + 65011969 = 778^2 + 8063^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 65617253 - 2² = 65617249 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65617553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200 + ... + 11457.

It is an arithmetic number, because the mean of its divisors is an integer number (8854251).

Almost surely, 2^65617253 is an apocalyptic number.

It is an amenable number.

65617253 is a deficient number, since it is larger than the sum of its proper divisors (5216755).

65617253 is a wasteful number, since it uses less digits than its factorization.

65617253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12103.

The product of its digits is 37800, while the sum is 35.

The square root of 65617253 is about 8100.4477036766. The cubic root of 65617253 is about 403.3412888413.

The spelling of 65617253 in words is "sixty-five million, six hundred seventeen thousand, two hundred fifty-three".