664563614 has 32 divisors (see below), whose sum is σ = 1174400640. Its totient is φ = 278056800.

The previous prime is 664563607. The next prime is 664563619. The reversal of 664563614 is 416365466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664563619) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 105329 + ... + 111459.

It is an arithmetic number, because the mean of its divisors is an integer number (36700020).

Almost surely, 2^664563614 is an apocalyptic number.

664563614 is a deficient number, since it is larger than the sum of its proper divisors (509837026).

664563614 is a wasteful number, since it uses less digits than its factorization.

664563614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6536.

The product of its digits is 311040, while the sum is 41.

The square root of 664563614 is about 25779.1313662815. The cubic root of 664563614 is about 872.6609042524.

The spelling of 664563614 in words is "six hundred sixty-four million, five hundred sixty-three thousand, six hundred fourteen".