664204542413 has 4 divisors (see below), whose sum is σ = 664489244508. Its totient is φ = 663919840320.

The previous prime is 664204542389. The next prime is 664204542437. The reversal of 664204542413 is 314245402466.

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

It is an interprime number because it is at equal distance from previous prime (664204542389) and next prime (664204542437).

It can be written as a sum of positive squares in 2 ways, for example, as 374688445924 + 289516096489 = 612118^2 + 538067^2 .

It is a cyclic number.

It is not a de Polignac number, because 664204542413 - 2¹² = 664204538317 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 (664204542913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142347548 + ... + 142352213.

It is an arithmetic number, because the mean of its divisors is an integer number (166122311127).

Almost surely, 2^664204542413 is an apocalyptic number.

It is an amenable number.

664204542413 is a deficient number, since it is larger than the sum of its proper divisors (284702095).

664204542413 is a wasteful number, since it uses less digits than its factorization.

664204542413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284702094.

The product of its (nonzero) digits is 552960, while the sum is 41.

Adding to 664204542413 its reverse (314245402466), we get a palindrome (978449944879).

The spelling of 664204542413 in words is "six hundred sixty-four billion, two hundred four million, five hundred forty-two thousand, four hundred thirteen".