65664521027 has 8 divisors (see below), whose sum is σ = 75049953792. Its totient is φ = 56280285000.

The previous prime is 65664521009. The next prime is 65664521033. The reversal of 65664521027 is 72012546656.

65664521027 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 a de Polignac number, because none of the positive numbers 2^k-65664521027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65664521077) 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, 178349 + ... + 403902.

It is an arithmetic number, because the mean of its divisors is an integer number (9381244224).

Almost surely, 2^65664521027 is an apocalyptic number.

65664521027 is a deficient number, since it is larger than the sum of its proper divisors (9385432765).

65664521027 is a wasteful number, since it uses less digits than its factorization.

65664521027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598369.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 65664521027 in words is "sixty-five billion, six hundred sixty-four million, five hundred twenty-one thousand, twenty-seven".