664006610 has 8 divisors (see below), whose sum is σ = 1195211916. Its totient is φ = 265602640.

The previous prime is 664006597. The next prime is 664006627. The reversal of 664006610 is 16600466.

It can be written as a sum of positive squares in 2 ways, for example, as 609645481 + 54361129 = 24691^2 + 7373^2 .

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

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, 33200321 + ... + 33200340.

Almost surely, 2^664006610 is an apocalyptic number.

664006610 is a deficient number, since it is larger than the sum of its proper divisors (531205306).

664006610 is a wasteful number, since it uses less digits than its factorization.

664006610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66400668.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 664006610 is about 25768.3257120054. The cubic root of 664006610 is about 872.4170291897.

The spelling of 664006610 in words is "six hundred sixty-four million, six thousand, six hundred ten".