64918663 has 2 divisors, whose sum is σ = 64918664. Its totient is φ = 64918662.

The previous prime is 64918589. The next prime is 64918697. The reversal of 64918663 is 36681946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64918663 - 2⁹ = 64918151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64918963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32459331 + 32459332.

It is an arithmetic number, because the mean of its divisors is an integer number (32459332).

Almost surely, 2^64918663 is an apocalyptic number.

64918663 is a deficient number, since it is larger than the sum of its proper divisors (1).

64918663 is an equidigital number, since it uses as much as digits as its factorization.

64918663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 43.

The square root of 64918663 is about 8057.2118626731. The cubic root of 64918663 is about 401.9047962302.

The spelling of 64918663 in words is "sixty-four million, nine hundred eighteen thousand, six hundred sixty-three".