63700666 has 8 divisors (see below), whose sum is σ = 101171700. Its totient is φ = 29976768.

The previous prime is 63700661. The next prime is 63700669. The reversal of 63700666 is 66600736.

It can be written as a sum of positive squares in 2 ways, for example, as 61387225 + 2313441 = 7835^2 + 1521^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 1873549 = 63700666 / (6 + 3 + 7 + 0 + 0 + 6 + 6 + 6).

It is not an unprimeable number, because it can be changed into a prime (63700661) 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 3 ways as a sum of consecutive naturals, for example, 936741 + ... + 936808.

Almost surely, 2^63700666 is an apocalyptic number.

63700666 is a deficient number, since it is larger than the sum of its proper divisors (37471034).

63700666 is a wasteful number, since it uses less digits than its factorization.

63700666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1873568.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 63700666 is about 7981.2696984878. The cubic root of 63700666 is about 399.3754127345.

The spelling of 63700666 in words is "sixty-three million, seven hundred thousand, six hundred sixty-six".