66462732065 has 4 divisors (see below), whose sum is σ = 79755278484. Its totient is φ = 53170185648.

The previous prime is 66462732043. The next prime is 66462732079. The reversal of 66462732065 is 56023726466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21977173009 + 44485559056 = 148247^2 + 210916^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66462732065 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6646273202 + ... + 6646273211.

It is an arithmetic number, because the mean of its divisors is an integer number (19938819621).

Almost surely, 2^66462732065 is an apocalyptic number.

It is an amenable number.

66462732065 is a deficient number, since it is larger than the sum of its proper divisors (13292546419).

66462732065 is a wasteful number, since it uses less digits than its factorization.

66462732065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13292546418.

The product of its (nonzero) digits is 2177280, while the sum is 47.

The spelling of 66462732065 in words is "sixty-six billion, four hundred sixty-two million, seven hundred thirty-two thousand, sixty-five".