63666683 has 8 divisors (see below), whose sum is σ = 68419152. Its totient is φ = 59026176.

The previous prime is 63666679. The next prime is 63666697. The reversal of 63666683 is 38666636.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63666683 - 2² = 63666679 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63666613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26810 + ... + 29087.

It is an arithmetic number, because the mean of its divisors is an integer number (8552394).

Almost surely, 2^63666683 is an apocalyptic number.

63666683 is a deficient number, since it is larger than the sum of its proper divisors (4752469).

63666683 is a wasteful number, since it uses less digits than its factorization.

63666683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55981.

The product of its digits is 559872, while the sum is 44.

The square root of 63666683 is about 7979.1404925593. The cubic root of 63666683 is about 399.3043805686.

The spelling of 63666683 in words is "sixty-three million, six hundred sixty-six thousand, six hundred eighty-three".