64668031 has 2 divisors, whose sum is σ = 64668032. Its totient is φ = 64668030.

The previous prime is 64668011. The next prime is 64668049. The reversal of 64668031 is 13086646.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64668031 - 2¹³ = 64659839 is a prime.

It is a super-2 number, since 2×64668031² = 8363908466833922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64668011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32334015 + 32334016.

It is an arithmetic number, because the mean of its divisors is an integer number (32334016).

Almost surely, 2^64668031 is an apocalyptic number.

64668031 is a deficient number, since it is larger than the sum of its proper divisors (1).

64668031 is an equidigital number, since it uses as much as digits as its factorization.

64668031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 64668031 is about 8041.6435509167. The cubic root of 64668031 is about 401.3869168463.

The spelling of 64668031 in words is "sixty-four million, six hundred sixty-eight thousand, thirty-one".