65070666521 has 8 divisors (see below), whose sum is σ = 74380794240. Its totient is φ = 55764118368.

The previous prime is 65070666511. The next prime is 65070666541. The reversal of 65070666521 is 12566607056.

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

It is not a de Polignac number, because 65070666521 - 2³⁰ = 63996924697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65070666511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 855821 + ... + 928746.

It is an arithmetic number, because the mean of its divisors is an integer number (9297599280).

Almost surely, 2^65070666521 is an apocalyptic number.

It is an amenable number.

65070666521 is a deficient number, since it is larger than the sum of its proper divisors (9310127719).

65070666521 is a wasteful number, since it uses less digits than its factorization.

65070666521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789783.

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 65070666521 in words is "sixty-five billion, seventy million, six hundred sixty-six thousand, five hundred twenty-one".