664425024149 has 4 divisors (see below), whose sum is σ = 671274766764. Its totient is φ = 657575281536.

The previous prime is 664425024089. The next prime is 664425024187. The reversal of 664425024149 is 941420524466.

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

It can be written as a sum of positive squares in 2 ways, for example, as 486252393124 + 178172631025 = 697318^2 + 422105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664425024149 is a prime.

It is a super-2 number, since 2×664425024149² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664425024649) 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, 3424871162 + ... + 3424871355.

It is an arithmetic number, because the mean of its divisors is an integer number (167818691691).

Almost surely, 2^664425024149 is an apocalyptic number.

It is an amenable number.

664425024149 is a deficient number, since it is larger than the sum of its proper divisors (6849742615).

664425024149 is an equidigital number, since it uses as much as digits as its factorization.

664425024149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6849742614.

The product of its (nonzero) digits is 1658880, while the sum is 47.

The spelling of 664425024149 in words is "six hundred sixty-four billion, four hundred twenty-five million, twenty-four thousand, one hundred forty-nine".