664746606 has 24 divisors (see below), whose sum is σ = 1458518880. Its totient is φ = 218776896.

The previous prime is 664746601. The next prime is 664746623. The reversal of 664746606 is 606647466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664746601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 232315 + ... + 235158.

It is an arithmetic number, because the mean of its divisors is an integer number (60771620).

Almost surely, 2^664746606 is an apocalyptic number.

664746606 is an abundant number, since it is smaller than the sum of its proper divisors (793772274).

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

664746606 is a wasteful number, since it uses less digits than its factorization.

664746606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467560 (or 467557 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The square root of 664746606 is about 25782.6803494129. The cubic root of 664746606 is about 872.7409945582.

The spelling of 664746606 in words is "six hundred sixty-four million, seven hundred forty-six thousand, six hundred six".