63660647 has 2 divisors, whose sum is σ = 63660648. Its totient is φ = 63660646.

The previous prime is 63660643. The next prime is 63660661. The reversal of 63660647 is 74606636.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63660647 - 2² = 63660643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63660647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63660643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31830323 + 31830324.

It is an arithmetic number, because the mean of its divisors is an integer number (31830324).

Almost surely, 2^63660647 is an apocalyptic number.

63660647 is a deficient number, since it is larger than the sum of its proper divisors (1).

63660647 is an equidigital number, since it uses as much as digits as its factorization.

63660647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 38.

The square root of 63660647 is about 7978.7622473664. The cubic root of 63660647 is about 399.2917613184.

The spelling of 63660647 in words is "sixty-three million, six hundred sixty thousand, six hundred forty-seven".