664530446 has 32 divisors (see below), whose sum is σ = 1043497728. Its totient is φ = 317041920.

The previous prime is 664530443. The next prime is 664530457. The reversal of 664530446 is 644035466.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664530443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2267876 + ... + 2268168.

It is an arithmetic number, because the mean of its divisors is an integer number (32609304).

Almost surely, 2^664530446 is an apocalyptic number.

664530446 is a deficient number, since it is larger than the sum of its proper divisors (378967282).

664530446 is a wasteful number, since it uses less digits than its factorization.

664530446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716.

The product of its (nonzero) digits is 207360, while the sum is 38.

The square root of 664530446 is about 25778.4880472071. The cubic root of 664530446 is about 872.6463860042.

The spelling of 664530446 in words is "six hundred sixty-four million, five hundred thirty thousand, four hundred forty-six".