664669966466 has 32 divisors (see below), whose sum is σ = 1145094865920. Its totient is φ = 286169317200.

The previous prime is 664669966459. The next prime is 664669966567.

664669966466 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 664669966393 and 664669966402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2194835 + ... + 2479241.

It is an arithmetic number, because the mean of its divisors is an integer number (35784214560).

Almost surely, 2^664669966466 is an apocalyptic number.

664669966466 is a deficient number, since it is larger than the sum of its proper divisors (480424899454).

664669966466 is a wasteful number, since it uses less digits than its factorization.

664669966466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290030.

The product of its digits is 2176782336, while the sum is 74.

The spelling of 664669966466 in words is "six hundred sixty-four billion, six hundred sixty-nine million, nine hundred sixty-six thousand, four hundred sixty-six".