664067606 has 8 divisors (see below), whose sum is σ = 1017295200. Its totient is φ = 324969208.

The previous prime is 664067603. The next prime is 664067623. The reversal of 664067606 is 606760466.

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 (664067603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3532181 + ... + 3532368.

It is an arithmetic number, because the mean of its divisors is an integer number (127161900).

Almost surely, 2^664067606 is an apocalyptic number.

664067606 is a deficient number, since it is larger than the sum of its proper divisors (353227594).

664067606 is a wasteful number, since it uses less digits than its factorization.

664067606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7064598.

The product of its (nonzero) digits is 217728, while the sum is 41.

The square root of 664067606 is about 25769.5092308721. The cubic root of 664067606 is about 872.4437419357.

The spelling of 664067606 in words is "six hundred sixty-four million, sixty-seven thousand, six hundred six".