664655611 has 8 divisors (see below), whose sum is σ = 697839120. Its totient is φ = 632156448.

The previous prime is 664655609. The next prime is 664655627. The reversal of 664655611 is 116556466.

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 664655611 - 2¹ = 664655609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664655111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169096 + ... + 172981.

It is an arithmetic number, because the mean of its divisors is an integer number (87229890).

Almost surely, 2^664655611 is an apocalyptic number.

664655611 is a deficient number, since it is larger than the sum of its proper divisors (33183509).

664655611 is a wasteful number, since it uses less digits than its factorization.

664655611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342173.

The product of its digits is 129600, while the sum is 40.

The square root of 664655611 is about 25780.9156354075. The cubic root of 664655611 is about 872.7011705159.

The spelling of 664655611 in words is "six hundred sixty-four million, six hundred fifty-five thousand, six hundred eleven".