664269446 has 8 divisors (see below), whose sum is σ = 1009017120. Its totient is φ = 327930408.

The previous prime is 664269439. The next prime is 664269449. The reversal of 664269446 is 644962466.

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

It is a self number, because there is not a number n which added to its sum of digits gives 664269446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664269449) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2101961 + ... + 2102276.

It is an arithmetic number, because the mean of its divisors is an integer number (126127140).

Almost surely, 2^664269446 is an apocalyptic number.

664269446 is a deficient number, since it is larger than the sum of its proper divisors (344747674).

664269446 is a wasteful number, since it uses less digits than its factorization.

664269446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4204318.

The product of its digits is 1492992, while the sum is 47.

The square root of 664269446 is about 25773.4251895242. The cubic root of 664269446 is about 872.5321246071.

The spelling of 664269446 in words is "six hundred sixty-four million, two hundred sixty-nine thousand, four hundred forty-six".