606664 has 8 divisors (see below), whose sum is σ = 1137510. Its totient is φ = 303328.

The previous prime is 606659. The next prime is 606673. The reversal of 606664 is 466606.

It can be written as a sum of positive squares in only one way, i.e., 396900 + 209764 = 630^2 + 458^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37909 + ... + 37924.

2⁶⁰⁶⁶⁶⁴ is an apocalyptic number.

It is an amenable number.

606664 is a deficient number, since it is larger than the sum of its proper divisors (530846).

606664 is a wasteful number, since it uses less digits than its factorization.

606664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75839 (or 75835 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 606664 is about 778.8863845260. The cubic root of 606664 is about 84.6543750799.

It can be divided in two parts, 60 and 6664, that added together give a square (6724 = 82²).

The spelling of 606664 in words is "six hundred six thousand, six hundred sixty-four".