664474474466 has 16 divisors (see below), whose sum is σ = 1134596731968. Its totient is φ = 288901945200.

The previous prime is 664474474457. The next prime is 664474474487.

It is a happy number.

664474474466 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 664474474399 and 664474474408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 656594825 + ... + 656595836.

It is an arithmetic number, because the mean of its divisors is an integer number (70912295748).

Almost surely, 2^664474474466 is an apocalyptic number.

664474474466 is a deficient number, since it is larger than the sum of its proper divisors (470122257502).

664474474466 is a wasteful number, since it uses less digits than its factorization.

664474474466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313190697.

The product of its digits is 260112384, while the sum is 62.

The spelling of 664474474466 in words is "six hundred sixty-four billion, four hundred seventy-four million, four hundred seventy-four thousand, four hundred sixty-six".