664016655 has 16 divisors (see below), whose sum is σ = 1118344320. Its totient is φ = 335503008.

The previous prime is 664016623. The next prime is 664016663. The reversal of 664016655 is 556610466.

664016655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664016655 - 2⁵ = 664016623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1164657 + ... + 1165226.

It is an arithmetic number, because the mean of its divisors is an integer number (69896520).

Almost surely, 2^664016655 is an apocalyptic number.

664016655 is a deficient number, since it is larger than the sum of its proper divisors (454327665).

664016655 is a wasteful number, since it uses less digits than its factorization.

664016655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2329910.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 664016655 is about 25768.5206210989. The cubic root of 664016655 is about 872.4214284355.

The spelling of 664016655 in words is "six hundred sixty-four million, sixteen thousand, six hundred fifty-five".