64436663 has 2 divisors, whose sum is σ = 64436664. Its totient is φ = 64436662.

The previous prime is 64436651. The next prime is 64436699. The reversal of 64436663 is 36663446.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64436663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64436863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32218331 + 32218332.

It is an arithmetic number, because the mean of its divisors is an integer number (32218332).

Almost surely, 2^64436663 is an apocalyptic number.

64436663 is a deficient number, since it is larger than the sum of its proper divisors (1).

64436663 is an equidigital number, since it uses as much as digits as its factorization.

64436663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 38.

The square root of 64436663 is about 8027.2450442228. The cubic root of 64436663 is about 400.9076534386.

The spelling of 64436663 in words is "sixty-four million, four hundred thirty-six thousand, six hundred sixty-three".