664916341 has 2 divisors, whose sum is σ = 664916342. Its totient is φ = 664916340.

The previous prime is 664916281. The next prime is 664916383. The reversal of 664916341 is 143619466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 553613841 + 111302500 = 23529^2 + 10550^2 .

It is a cyclic number.

It is not a de Polignac number, because 664916341 - 2⁹ = 664915829 is a prime.

It is a super-2 number, since 2×664916341² = 884227481057656562, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 664916294 and 664916303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664916041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332458170 + 332458171.

It is an arithmetic number, because the mean of its divisors is an integer number (332458171).

Almost surely, 2^664916341 is an apocalyptic number.

It is an amenable number.

664916341 is a deficient number, since it is larger than the sum of its proper divisors (1).

664916341 is an equidigital number, since it uses as much as digits as its factorization.

664916341 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 40.

The square root of 664916341 is about 25785.9717870008. The cubic root of 664916341 is about 872.8152695200.

The spelling of 664916341 in words is "six hundred sixty-four million, nine hundred sixteen thousand, three hundred forty-one".