664423101527 has 2 divisors, whose sum is σ = 664423101528. Its totient is φ = 664423101526.

The previous prime is 664423101521. The next prime is 664423101533. The reversal of 664423101527 is 725101324466.

It is a balanced prime because it is at equal distance from previous prime (664423101521) and next prime (664423101533).

It is a cyclic number.

It is not a de Polignac number, because 664423101527 - 2¹⁰ = 664423100503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664423101521) 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 as a sum of consecutive naturals, namely, 332211550763 + 332211550764.

It is an arithmetic number, because the mean of its divisors is an integer number (332211550764).

Almost surely, 2^664423101527 is an apocalyptic number.

664423101527 is a deficient number, since it is larger than the sum of its proper divisors (1).

664423101527 is an equidigital number, since it uses as much as digits as its factorization.

664423101527 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 664423101527 in words is "six hundred sixty-four billion, four hundred twenty-three million, one hundred one thousand, five hundred twenty-seven".