664334101 has 2 divisors, whose sum is σ = 664334102. Its totient is φ = 664334100.

The previous prime is 664334087. The next prime is 664334113. The reversal of 664334101 is 101433466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 543356100 + 120978001 = 23310^2 + 10999^2 .

It is a cyclic number.

It is not a de Polignac number, because 664334101 - 2⁹ = 664333589 is a prime.

It is a super-3 number, since 3×664334101³ (a number of 27 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 664334101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664334131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332167050 + 332167051.

It is an arithmetic number, because the mean of its divisors is an integer number (332167051).

Almost surely, 2^664334101 is an apocalyptic number.

It is an amenable number.

664334101 is a deficient number, since it is larger than the sum of its proper divisors (1).

664334101 is an equidigital number, since it uses as much as digits as its factorization.

664334101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 664334101 is about 25774.6794548448. The cubic root of 664334101 is about 872.5604322638.

Adding to 664334101 its reverse (101433466), we get a palindrome (765767567).

The spelling of 664334101 in words is "six hundred sixty-four million, three hundred thirty-four thousand, one hundred one".