664477146641204 has 12 divisors (see below), whose sum is σ = 1252283853285444. Its totient is φ = 306681759988224.

The previous prime is 664477146641201. The next prime is 664477146641251. The reversal of 664477146641204 is 402146641774466.

It can be written as a sum of positive squares in 2 ways, for example, as 188812387773604 + 475664758867600 = 13740902^2 + 21809740^2 .

It is a super-2 number, since 2×664477146641204² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664477146641201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6389203333037 + ... + 6389203333140.

It is an arithmetic number, because the mean of its divisors is an integer number (104356987773787).

Almost surely, 2^{664477146641204} is an apocalyptic number.

It is an amenable number.

664477146641204 is a deficient number, since it is larger than the sum of its proper divisors (587806706644240).

664477146641204 is a wasteful number, since it uses less digits than its factorization.

664477146641204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12778406666194 (or 12778406666192 counting only the distinct ones).

The product of its (nonzero) digits is 130056192, while the sum is 62.

The spelling of 664477146641204 in words is "six hundred sixty-four trillion, four hundred seventy-seven billion, one hundred forty-six million, six hundred forty-one thousand, two hundred four".