664317485 has 8 divisors (see below), whose sum is σ = 858502680. Its totient is φ = 490572864.

The previous prime is 664317481. The next prime is 664317497. The reversal of 664317485 is 584713466.

It can be written as a sum of positive squares in 4 ways, for example, as 32649796 + 631667689 = 5714^2 + 25133^2 .

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 664317485 - 2² = 664317481 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664317481) 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, 5110070 + ... + 5110199.

It is an arithmetic number, because the mean of its divisors is an integer number (107312835).

Almost surely, 2^664317485 is an apocalyptic number.

664317485 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

664317485 is a deficient number, since it is larger than the sum of its proper divisors (194185195).

664317485 is a wasteful number, since it uses less digits than its factorization.

664317485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10220287.

The product of its digits is 483840, while the sum is 44.

The square root of 664317485 is about 25774.3571209836. The cubic root of 664317485 is about 872.5531575180.

The spelling of 664317485 in words is "six hundred sixty-four million, three hundred seventeen thousand, four hundred eighty-five".