65807641 has 8 divisors (see below), whose sum is σ = 68168520. Its totient is φ = 63452928.

The previous prime is 65807633. The next prime is 65807647. The reversal of 65807641 is 14670856.

65807641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 14470416 + 51337225 = 3804^2 + 7165^2 .

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

It is not a de Polignac number, because 65807641 - 2³ = 65807633 is a prime.

It is a super-2 number, since 2×65807641² = 8661291227969762, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65807641.

It is not an unprimeable number, because it can be changed into a prime (65807647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36145 + ... + 37921.

It is an arithmetic number, because the mean of its divisors is an integer number (8521065).

Almost surely, 2^65807641 is an apocalyptic number.

It is an amenable number.

65807641 is a deficient number, since it is larger than the sum of its proper divisors (2360879).

65807641 is a wasteful number, since it uses less digits than its factorization.

65807641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3083.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 65807641 is about 8112.1908877935. The cubic root of 65807641 is about 403.7310094682.

The spelling of 65807641 in words is "sixty-five million, eight hundred seven thousand, six hundred forty-one".