664126241 has 8 divisors (see below), whose sum is σ = 680740200. Its totient is φ = 647532160.

The previous prime is 664126201. The next prime is 664126259. The reversal of 664126241 is 142621466.

It can be written as a sum of positive squares in 4 ways, for example, as 52998400 + 611127841 = 7280^2 + 24721^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664126241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664126198 and 664126207.

It is not an unprimeable number, because it can be changed into a prime (664126201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80915 + ... + 88743.

It is an arithmetic number, because the mean of its divisors is an integer number (85092525).

Almost surely, 2^664126241 is an apocalyptic number.

It is an amenable number.

664126241 is a deficient number, since it is larger than the sum of its proper divisors (16613959).

664126241 is a wasteful number, since it uses less digits than its factorization.

664126241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9939.

The product of its digits is 13824, while the sum is 32.

The square root of 664126241 is about 25770.6468874959. The cubic root of 664126241 is about 872.4694191573.

The spelling of 664126241 in words is "six hundred sixty-four million, one hundred twenty-six thousand, two hundred forty-one".