664420610 has 16 divisors (see below), whose sum is σ = 1366808256. Its totient is φ = 227801328.

The previous prime is 664420597. The next prime is 664420637. The reversal of 664420610 is 16024466.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4745792 + ... + 4745931.

It is an arithmetic number, because the mean of its divisors is an integer number (85425516).

Almost surely, 2^664420610 is an apocalyptic number.

664420610 is an abundant number, since it is smaller than the sum of its proper divisors (702387646).

664420610 is a wasteful number, since it uses less digits than its factorization.

664420610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9491737.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 664420610 is about 25776.3575782150. The cubic root of 664420610 is about 872.5983053029.

The spelling of 664420610 in words is "six hundred sixty-four million, four hundred twenty thousand, six hundred ten".