664325041 has 2 divisors, whose sum is σ = 664325042. Its totient is φ = 664325040.

The previous prime is 664325029. The next prime is 664325059. The reversal of 664325041 is 140523466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 625200016 + 39125025 = 25004^2 + 6255^2 .

It is a cyclic number.

It is not a de Polignac number, because 664325041 - 2¹¹ = 664322993 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 664324994 and 664325012.

It is not a weakly prime, because it can be changed into another prime (664326041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332162520 + 332162521.

It is an arithmetic number, because the mean of its divisors is an integer number (332162521).

Almost surely, 2^664325041 is an apocalyptic number.

It is an amenable number.

664325041 is a deficient number, since it is larger than the sum of its proper divisors (1).

664325041 is an equidigital number, since it uses as much as digits as its factorization.

664325041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 664325041 is about 25774.5037003625. The cubic root of 664325041 is about 872.5564656685.

It can be divided in two parts, 6643 and 25041, that added together give a square (31684 = 178²).

The spelling of 664325041 in words is "six hundred sixty-four million, three hundred twenty-five thousand, forty-one".