664476485 has 8 divisors (see below), whose sum is σ = 800211096. Its totient is φ = 529688320.

The previous prime is 664476479. The next prime is 664476487. The reversal of 664476485 is 584674466.

It can be written as a sum of positive squares in 4 ways, for example, as 176199076 + 488277409 = 13274^2 + 22097^2 .

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

It is not a de Polignac number, because 664476485 - 2²⁰ = 663427909 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 (664476487) 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, 235064 + ... + 237873.

It is an arithmetic number, because the mean of its divisors is an integer number (100026387).

Almost surely, 2^664476485 is an apocalyptic number.

It is an amenable number.

664476485 is a deficient number, since it is larger than the sum of its proper divisors (135734611).

664476485 is a wasteful number, since it uses less digits than its factorization.

664476485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473223.

The product of its digits is 3870720, while the sum is 50.

The square root of 664476485 is about 25777.4413974700. The cubic root of 664476485 is about 872.6227652423.

The spelling of 664476485 in words is "six hundred sixty-four million, four hundred seventy-six thousand, four hundred eighty-five".