664680622 has 8 divisors (see below), whose sum is σ = 1010678976. Its totient is φ = 327787632.

The previous prime is 664680589. The next prime is 664680623. The reversal of 664680622 is 226086466.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664680623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2276158 + ... + 2276449.

It is an arithmetic number, because the mean of its divisors is an integer number (126334872).

Almost surely, 2^664680622 is an apocalyptic number.

664680622 is a deficient number, since it is larger than the sum of its proper divisors (345998354).

664680622 is a wasteful number, since it uses less digits than its factorization.

664680622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4552682.

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 664680622 is about 25781.4006989535. The cubic root of 664680622 is about 872.7121169644.

The spelling of 664680622 in words is "six hundred sixty-four million, six hundred eighty thousand, six hundred twenty-two".