664445662 has 4 divisors (see below), whose sum is σ = 996668496. Its totient is φ = 332222830.

The previous prime is 664445657. The next prime is 664445681. The reversal of 664445662 is 266544466.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 166111414 + ... + 166111417.

It is an arithmetic number, because the mean of its divisors is an integer number (249167124).

Almost surely, 2^664445662 is an apocalyptic number.

664445662 is a deficient number, since it is larger than the sum of its proper divisors (332222834).

664445662 is a wasteful number, since it uses less digits than its factorization.

664445662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332222833.

The product of its digits is 829440, while the sum is 43.

The square root of 664445662 is about 25776.8435228210. The cubic root of 664445662 is about 872.6092722806.

The spelling of 664445662 in words is "six hundred sixty-four million, four hundred forty-five thousand, six hundred sixty-two".