664245611 has 4 divisors (see below), whose sum is σ = 664854432. Its totient is φ = 663636792.

The previous prime is 664245583. The next prime is 664245619. The reversal of 664245611 is 116542466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664245611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664245619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302771 + ... + 304956.

It is an arithmetic number, because the mean of its divisors is an integer number (166213608).

Almost surely, 2^664245611 is an apocalyptic number.

664245611 is a deficient number, since it is larger than the sum of its proper divisors (608821).

664245611 is a wasteful number, since it uses less digits than its factorization.

664245611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608820.

The product of its digits is 34560, while the sum is 35.

The square root of 664245611 is about 25772.9627904903. The cubic root of 664245611 is about 872.5216885548.

The spelling of 664245611 in words is "six hundred sixty-four million, two hundred forty-five thousand, six hundred eleven".