664464655 has 32 divisors (see below), whose sum is σ = 838252800. Its totient is φ = 505190400.

The previous prime is 664464653. The next prime is 664464677. The reversal of 664464655 is 556464466.

It is not a de Polignac number, because 664464655 - 2¹ = 664464653 is a prime.

Its product of digits (2073600) is a multiple of the sum of its prime divisors (675).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664464653) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1441125 + ... + 1441585.

It is an arithmetic number, because the mean of its divisors is an integer number (26195400).

Almost surely, 2^664464655 is an apocalyptic number.

664464655 is a deficient number, since it is larger than the sum of its proper divisors (173788145).

664464655 is a wasteful number, since it uses less digits than its factorization.

664464655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675.

The product of its digits is 2073600, while the sum is 46.

The square root of 664464655 is about 25777.2119322474. The cubic root of 664464655 is about 872.6175866349.

The spelling of 664464655 in words is "six hundred sixty-four million, four hundred sixty-four thousand, six hundred fifty-five".