63538666 has 8 divisors (see below), whose sum is σ = 95948100. Its totient is φ = 31555968.

The previous prime is 63538609. The next prime is 63538667. The reversal of 63538666 is 66683536.

It can be written as a sum of positive squares in 2 ways, for example, as 43099225 + 20439441 = 6565^2 + 4521^2 .

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

It is not an unprimeable number, because it can be changed into a prime (63538667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106311 + ... + 106906.

Almost surely, 2^63538666 is an apocalyptic number.

63538666 is a deficient number, since it is larger than the sum of its proper divisors (32409434).

63538666 is a wasteful number, since it uses less digits than its factorization.

63538666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213368.

The product of its digits is 466560, while the sum is 43.

The square root of 63538666 is about 7971.1144766588. The cubic root of 63538666 is about 399.0365688642.

The spelling of 63538666 in words is "sixty-three million, five hundred thirty-eight thousand, six hundred sixty-six".