63866371 has 2 divisors, whose sum is σ = 63866372. Its totient is φ = 63866370.

The previous prime is 63866359. The next prime is 63866419. The reversal of 63866371 is 17366836.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63866371 - 2⁵ = 63866339 is a prime.

It is not a weakly prime, because it can be changed into another prime (63866351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31933185 + 31933186.

It is an arithmetic number, because the mean of its divisors is an integer number (31933186).

Almost surely, 2^63866371 is an apocalyptic number.

63866371 is a deficient number, since it is larger than the sum of its proper divisors (1).

63866371 is an equidigital number, since it uses as much as digits as its factorization.

63866371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 40.

The square root of 63866371 is about 7991.6438233945. The cubic root of 63866371 is about 399.7214122672.

The spelling of 63866371 in words is "sixty-three million, eight hundred sixty-six thousand, three hundred seventy-one".