664666466 has 8 divisors (see below), whose sum is σ = 1040347584. Its totient is φ = 317883940.

The previous prime is 664666463. The next prime is 664666477.

664666466 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×664666466² = 883563022049858312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664666463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7224590 + ... + 7224681.

It is an arithmetic number, because the mean of its divisors is an integer number (130043448).

Almost surely, 2^664666466 is an apocalyptic number.

664666466 is a deficient number, since it is larger than the sum of its proper divisors (375681118).

664666466 is a wasteful number, since it uses less digits than its factorization.

664666466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14449296.

The product of its digits is 4478976, while the sum is 50.

The square root of 664666466 is about 25781.1261584904. The cubic root of 664666466 is about 872.7059214072.

The spelling of 664666466 in words is "six hundred sixty-four million, six hundred sixty-six thousand, four hundred sixty-six".