664207055 has 8 divisors (see below), whose sum is σ = 814007232. Its totient is φ = 520059808.

The previous prime is 664207043. The next prime is 664207067. The reversal of 664207055 is 550702466.

It is an interprime number because it is at equal distance from previous prime (664207043) and next prime (664207067).

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

It is a cyclic number.

It is not a de Polignac number, because 664207055 - 2¹⁶ = 664141519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1412972 + ... + 1413441.

It is an arithmetic number, because the mean of its divisors is an integer number (101750904).

Almost surely, 2^664207055 is an apocalyptic number.

664207055 is a deficient number, since it is larger than the sum of its proper divisors (149800177).

664207055 is a wasteful number, since it uses less digits than its factorization.

664207055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2826465.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 664207055 is about 25772.2147864711. The cubic root of 664207055 is about 872.5048064475.

The spelling of 664207055 in words is "six hundred sixty-four million, two hundred seven thousand, fifty-five".