66663116465 has 16 divisors (see below), whose sum is σ = 87706627200. Its totient is φ = 48238629120.

The previous prime is 66663116461. The next prime is 66663116479. The reversal of 66663116465 is 56461136666.

It is not a de Polignac number, because 66663116465 - 2² = 66663116461 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66663116461) 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, 3034424 + ... + 3056313.

It is an arithmetic number, because the mean of its divisors is an integer number (5481664200).

Almost surely, 2^66663116465 is an apocalyptic number.

It is an amenable number.

66663116465 is a deficient number, since it is larger than the sum of its proper divisors (21043510735).

66663116465 is a wasteful number, since it uses less digits than its factorization.

66663116465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6090952.

The product of its digits is 2799360, while the sum is 50.

The spelling of 66663116465 in words is "sixty-six billion, six hundred sixty-three million, one hundred sixteen thousand, four hundred sixty-five".