65639744107 has 8 divisors (see below), whose sum is σ = 75745170176. Its totient is φ = 55716397992.

The previous prime is 65639744077. The next prime is 65639744117. The reversal of 65639744107 is 70144793656.

65639744107 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 65639744107 - 2²⁷ = 65505526379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65639744117) 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, 45519213 + ... + 45520654.

It is an arithmetic number, because the mean of its divisors is an integer number (9468146272).

Almost surely, 2^65639744107 is an apocalyptic number.

65639744107 is a deficient number, since it is larger than the sum of its proper divisors (10105426069).

65639744107 is a wasteful number, since it uses less digits than its factorization.

65639744107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91039977.

The product of its (nonzero) digits is 3810240, while the sum is 52.

The spelling of 65639744107 in words is "sixty-five billion, six hundred thirty-nine million, seven hundred forty-four thousand, one hundred seven".