65660413 has 16 divisors (see below), whose sum is σ = 81043200. Its totient is φ = 51803136.

The previous prime is 65660369. The next prime is 65660417. The reversal of 65660413 is 31406656.

It is not a de Polignac number, because 65660413 - 2¹³ = 65652221 is a prime.

It is a super-2 number, since 2×65660413² = 8622579670661138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65660417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40056 + ... + 41662.

It is an arithmetic number, because the mean of its divisors is an integer number (5065200).

Almost surely, 2^65660413 is an apocalyptic number.

It is an amenable number.

65660413 is a deficient number, since it is larger than the sum of its proper divisors (15382787).

65660413 is a wasteful number, since it uses less digits than its factorization.

65660413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 65660413 is about 8103.1113160316. Note that the first 3 decimals coincide. The cubic root of 65660413 is about 403.4297025529.

The spelling of 65660413 in words is "sixty-five million, six hundred sixty thousand, four hundred thirteen".