664935041 has 2 divisors, whose sum is σ = 664935042. Its totient is φ = 664935040.

The previous prime is 664935023. The next prime is 664935071. The reversal of 664935041 is 140539466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 612067600 + 52867441 = 24740^2 + 7271^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664935041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664934986 and 664935004.

It is not a weakly prime, because it can be changed into another prime (664935071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332467520 + 332467521.

It is an arithmetic number, because the mean of its divisors is an integer number (332467521).

Almost surely, 2^664935041 is an apocalyptic number.

It is an amenable number.

664935041 is a deficient number, since it is larger than the sum of its proper divisors (1).

664935041 is an equidigital number, since it uses as much as digits as its factorization.

664935041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 664935041 is about 25786.3343847085. The cubic root of 664935041 is about 872.8234517486.

The spelling of 664935041 in words is "six hundred sixty-four million, nine hundred thirty-five thousand, forty-one".