64680841 has 2 divisors, whose sum is σ = 64680842. Its totient is φ = 64680840.

The previous prime is 64680797. The next prime is 64680871. The reversal of 64680841 is 14808646.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47665216 + 17015625 = 6904^2 + 4125^2 .

It is a cyclic number.

It is not a de Polignac number, because 64680841 - 2⁷ = 64680713 is a prime.

It is a super-2 number, since 2×64680841² = 8367222384934562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64680841.

It is not a weakly prime, because it can be changed into another prime (64680871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32340420 + 32340421.

It is an arithmetic number, because the mean of its divisors is an integer number (32340421).

Almost surely, 2^64680841 is an apocalyptic number.

It is an amenable number.

64680841 is a deficient number, since it is larger than the sum of its proper divisors (1).

64680841 is an equidigital number, since it uses as much as digits as its factorization.

64680841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 64680841 is about 8042.4399904507. The cubic root of 64680841 is about 401.4134184878.

The spelling of 64680841 in words is "sixty-four million, six hundred eighty thousand, eight hundred forty-one".