65613245 has 8 divisors (see below), whose sum is σ = 79145016. Its totient is φ = 52217856.

The previous prime is 65613241. The next prime is 65613257. The reversal of 65613245 is 54231656.

It can be written as a sum of positive squares in 4 ways, for example, as 6461764 + 59151481 = 2542^2 + 7691^2 .

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 65613245 - 2² = 65613241 is a prime.

It is a super-3 number, since 3×65613245³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65613241) 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 7 ways as a sum of consecutive naturals, for example, 33032 + ... + 34961.

It is an arithmetic number, because the mean of its divisors is an integer number (9893127).

Almost surely, 2^65613245 is an apocalyptic number.

It is an amenable number.

65613245 is a deficient number, since it is larger than the sum of its proper divisors (13531771).

65613245 is a wasteful number, since it uses less digits than its factorization.

65613245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68191.

The product of its digits is 21600, while the sum is 32.

The square root of 65613245 is about 8100.2003061653. The cubic root of 65613245 is about 403.3330764442. Note that the first 3 decimals are identical.

The spelling of 65613245 in words is "sixty-five million, six hundred thirteen thousand, two hundred forty-five".