664621030 has 8 divisors (see below), whose sum is σ = 1196317872. Its totient is φ = 265848408.

The previous prime is 664621003. The next prime is 664621079. The reversal of 664621030 is 30126466.

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

It is a super-2 number, since 2×664621030² = 883442227036521800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 664621030.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 33231042 + ... + 33231061.

It is an arithmetic number, because the mean of its divisors is an integer number (149539734).

Almost surely, 2^664621030 is an apocalyptic number.

664621030 is a deficient number, since it is larger than the sum of its proper divisors (531696842).

664621030 is a wasteful number, since it uses less digits than its factorization.

664621030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66462110.

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

The square root of 664621030 is about 25780.2449561675. The cubic root of 664621030 is about 872.6860351576.

Adding to 664621030 its reverse (30126466), we get a palindrome (694747496).

The spelling of 664621030 in words is "six hundred sixty-four million, six hundred twenty-one thousand, thirty".