65224360531661 has 8 divisors (see below), whose sum is σ = 66197997772320. Its totient is φ = 64250727388848.

The previous prime is 65224360531613. The next prime is 65224360531699. The reversal of 65224360531661 is 16613506342256.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65224360531661 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 (65224360531261) 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, 49521530 + ... + 50821556.

It is an arithmetic number, because the mean of its divisors is an integer number (8274749721540).

Almost surely, 2^{65224360531661} is an apocalyptic number.

It is an amenable number.

65224360531661 is a deficient number, since it is larger than the sum of its proper divisors (973637240659).

65224360531661 is a wasteful number, since it uses less digits than its factorization.

65224360531661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048923.

The product of its (nonzero) digits is 4665600, while the sum is 50.

The spelling of 65224360531661 in words is "sixty-five trillion, two hundred twenty-four billion, three hundred sixty million, five hundred thirty-one thousand, six hundred sixty-one".