64680871 has 2 divisors, whose sum is σ = 64680872. Its totient is φ = 64680870.

The previous prime is 64680841. The next prime is 64680877. The reversal of 64680871 is 17808646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64680871 - 2⁷ = 64680743 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64680877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32340435 + 32340436.

It is an arithmetic number, because the mean of its divisors is an integer number (32340436).

Almost surely, 2^64680871 is an apocalyptic number.

64680871 is a deficient number, since it is larger than the sum of its proper divisors (1).

64680871 is an equidigital number, since it uses as much as digits as its factorization.

64680871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 64680871 is about 8042.4418555561. The cubic root of 64680871 is about 401.4134805484.

The spelling of 64680871 in words is "sixty-four million, six hundred eighty thousand, eight hundred seventy-one".