63666436 has 12 divisors (see below), whose sum is σ = 115010560. Its totient is φ = 30806280.

The previous prime is 63666431. The next prime is 63666437. The reversal of 63666436 is 63466636.

63666436 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (63666431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256596 + ... + 256843.

Almost surely, 2^63666436 is an apocalyptic number.

It is an amenable number.

63666436 is a deficient number, since it is larger than the sum of its proper divisors (51344124).

63666436 is a wasteful number, since it uses less digits than its factorization.

63666436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513474 (or 513472 counting only the distinct ones).

The product of its digits is 279936, while the sum is 40.

The square root of 63666436 is about 7979.1250146868. The cubic root of 63666436 is about 399.3038641902.

The spelling of 63666436 in words is "sixty-three million, six hundred sixty-six thousand, four hundred thirty-six".