65723641 has 8 divisors (see below), whose sum is σ = 69545120. Its totient is φ = 61938432.

The previous prime is 65723639. The next prime is 65723659. The reversal of 65723641 is 14632756.

It is a happy number.

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 65723641 - 2¹ = 65723639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65723597 and 65723606.

It is not an unprimeable number, because it can be changed into a prime (65723341) 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, 5295 + ... + 12628.

It is an arithmetic number, because the mean of its divisors is an integer number (8693140).

Almost surely, 2^65723641 is an apocalyptic number.

It is an amenable number.

65723641 is a deficient number, since it is larger than the sum of its proper divisors (3821479).

65723641 is a wasteful number, since it uses less digits than its factorization.

65723641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18135.

The product of its digits is 30240, while the sum is 34.

The square root of 65723641 is about 8107.0118416097. The cubic root of 65723641 is about 403.5591558452.

The spelling of 65723641 in words is "sixty-five million, seven hundred twenty-three thousand, six hundred forty-one".