63966673 has 12 divisors (see below), whose sum is σ = 69349620. Its totient is φ = 58949856.

The previous prime is 63966659. The next prime is 63966731. The reversal of 63966673 is 37666936.

It can be written as a sum of positive squares in 2 ways, for example, as 29942784 + 34023889 = 5472^2 + 5833^2 .

It is not a de Polignac number, because 63966673 - 2⁵ = 63966641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63966653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10963 + ... + 15751.

It is an arithmetic number, because the mean of its divisors is an integer number (5779135).

Almost surely, 2^63966673 is an apocalyptic number.

It is an amenable number.

63966673 is a deficient number, since it is larger than the sum of its proper divisors (5382947).

63966673 is a wasteful number, since it uses less digits than its factorization.

63966673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4864 (or 4845 counting only the distinct ones).

The product of its digits is 734832, while the sum is 46.

The square root of 63966673 is about 7997.9167912651. The cubic root of 63966673 is about 399.9305566948.

The spelling of 63966673 in words is "sixty-three million, nine hundred sixty-six thousand, six hundred seventy-three".