66487678466 has 24 divisors (see below), whose sum is σ = 109649113392. Its totient is φ = 30214265400.

The previous prime is 66487678459. The next prime is 66487678529.

66487678466 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×66487678466² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66487678396 and 66487678405.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1024361 + ... + 1087331.

It is an arithmetic number, because the mean of its divisors is an integer number (4568713058).

Almost surely, 2^66487678466 is an apocalyptic number.

66487678466 is a deficient number, since it is larger than the sum of its proper divisors (43161434926).

66487678466 is a wasteful number, since it uses less digits than its factorization.

66487678466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67358 (or 67347 counting only the distinct ones).

The product of its digits is 390168576, while the sum is 68.

The spelling of 66487678466 in words is "sixty-six billion, four hundred eighty-seven million, six hundred seventy-eight thousand, four hundred sixty-six".