64784663 has 2 divisors, whose sum is σ = 64784664. Its totient is φ = 64784662.

The previous prime is 64784647. The next prime is 64784683. The reversal of 64784663 is 36648746.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64784663 - 2⁴ = 64784647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64784683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32392331 + 32392332.

It is an arithmetic number, because the mean of its divisors is an integer number (32392332).

Almost surely, 2^64784663 is an apocalyptic number.

64784663 is a deficient number, since it is larger than the sum of its proper divisors (1).

64784663 is an equidigital number, since it uses as much as digits as its factorization.

64784663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 44.

The square root of 64784663 is about 8048.8920355537. The cubic root of 64784663 is about 401.6280789898.

The spelling of 64784663 in words is "sixty-four million, seven hundred eighty-four thousand, six hundred sixty-three".