664124117 has 2 divisors, whose sum is σ = 664124118. Its totient is φ = 664124116.

The previous prime is 664124101. The next prime is 664124179. The reversal of 664124117 is 711421466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 480223396 + 183900721 = 21914^2 + 13561^2 .

It is a cyclic number.

It is not a de Polignac number, because 664124117 - 2⁴ = 664124101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664124717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332062058 + 332062059.

It is an arithmetic number, because the mean of its divisors is an integer number (332062059).

Almost surely, 2^664124117 is an apocalyptic number.

It is an amenable number.

664124117 is a deficient number, since it is larger than the sum of its proper divisors (1).

664124117 is an equidigital number, since it uses as much as digits as its factorization.

664124117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 664124117 is about 25770.6056777872. The cubic root of 664124117 is about 872.4684890495.

The spelling of 664124117 in words is "six hundred sixty-four million, one hundred twenty-four thousand, one hundred seventeen".