604664666 has 4 divisors (see below), whose sum is σ = 906997002. Its totient is φ = 302332332.

The previous prime is 604664663. The next prime is 604664677. The reversal of 604664666 is 666466406.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 457746025 + 146918641 = 21395^2 + 12121^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (604664663) 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 as a sum of consecutive naturals, namely, 151166165 + ... + 151166168.

Almost surely, 2^604664666 is an apocalyptic number.

604664666 is a deficient number, since it is larger than the sum of its proper divisors (302332336).

604664666 is a wasteful number, since it uses less digits than its factorization.

604664666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302332335.

The product of its (nonzero) digits is 746496, while the sum is 44.

The square root of 604664666 is about 24589.9301747687. The cubic root of 604664666 is about 845.6127651577.

The spelling of 604664666 in words is "six hundred four million, six hundred sixty-four thousand, six hundred sixty-six".