66327515577609 has 16 divisors (see below), whose sum is σ = 103897646779584. Its totient is φ = 37106302420800.

The previous prime is 66327515577563. The next prime is 66327515577629. The reversal of 66327515577609 is 90677551572366.

It is not a de Polignac number, because 66327515577609 - 2⁸ = 66327515577353 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66327515577629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77304796282 + ... + 77304797139.

It is an arithmetic number, because the mean of its divisors is an integer number (6493602923724).

Almost surely, 2^{66327515577609} is an apocalyptic number.

It is an amenable number.

66327515577609 is a deficient number, since it is larger than the sum of its proper divisors (37570131201975).

66327515577609 is a wasteful number, since it uses less digits than its factorization.

66327515577609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154609593448.

The product of its (nonzero) digits is 500094000, while the sum is 69.

The spelling of 66327515577609 in words is "sixty-six trillion, three hundred twenty-seven billion, five hundred fifteen million, five hundred seventy-seven thousand, six hundred nine".