664956659466 has 48 divisors (see below), whose sum is σ = 1572230638368. Its totient is φ = 201436005600.

The previous prime is 664956659453. The next prime is 664956659491.

664956659466 is a `hidden beast` number, since 6 + 6 + 4 + 9 + 566 + 59 + 4 + 6 + 6 = 666.

664956659466 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 664956659394 and 664956659403.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57505 + ... + 1154651.

It is an arithmetic number, because the mean of its divisors is an integer number (32754804966).

Almost surely, 2^664956659466 is an apocalyptic number.

664956659466 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

664956659466 is an abundant number, since it is smaller than the sum of its proper divisors (907273978902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664956659466 is a wasteful number, since it uses less digits than its factorization.

664956659466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100227 (or 1100224 counting only the distinct ones).

The product of its digits is 1511654400, while the sum is 72.

The spelling of 664956659466 in words is "six hundred sixty-four billion, nine hundred fifty-six million, six hundred fifty-nine thousand, four hundred sixty-six".