63664747 has 2 divisors, whose sum is σ = 63664748. Its totient is φ = 63664746.

The previous prime is 63664723. The next prime is 63664781. The reversal of 63664747 is 74746636.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63664747 - 2⁷ = 63664619 is a prime.

It is not a weakly prime, because it can be changed into another prime (63664547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31832373 + 31832374.

It is an arithmetic number, because the mean of its divisors is an integer number (31832374).

Almost surely, 2^63664747 is an apocalyptic number.

63664747 is a deficient number, since it is larger than the sum of its proper divisors (1).

63664747 is an equidigital number, since it uses as much as digits as its factorization.

63664747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 43.

The square root of 63664747 is about 7979.0191753122. The cubic root of 63664747 is about 399.3003331292.

The spelling of 63664747 in words is "sixty-three million, six hundred sixty-four thousand, seven hundred forty-seven".