664311653 has 8 divisors (see below), whose sum is σ = 684687648. Its totient is φ = 644063184.

The previous prime is 664311623. The next prime is 664311667. The reversal of 664311653 is 356113466.

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 664311653 - 2⁶ = 664311589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664311623) 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, 21251 + ... + 42192.

It is an arithmetic number, because the mean of its divisors is an integer number (85585956).

Almost surely, 2^664311653 is an apocalyptic number.

It is an amenable number.

664311653 is a deficient number, since it is larger than the sum of its proper divisors (20375995).

664311653 is a wasteful number, since it uses less digits than its factorization.

664311653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63763.

The product of its digits is 38880, while the sum is 35.

The square root of 664311653 is about 25774.2439850328. The cubic root of 664311653 is about 872.5506041481.

The spelling of 664311653 in words is "six hundred sixty-four million, three hundred eleven thousand, six hundred fifty-three".