63640066 has 8 divisors (see below), whose sum is σ = 109097280. Its totient is φ = 27274308.

The previous prime is 63640039. The next prime is 63640079. The reversal of 63640066 is 66004636.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2272846 + ... + 2272873.

It is an arithmetic number, because the mean of its divisors is an integer number (13637160).

Almost surely, 2^63640066 is an apocalyptic number.

63640066 is a deficient number, since it is larger than the sum of its proper divisors (45457214).

63640066 is a wasteful number, since it uses less digits than its factorization.

63640066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4545728.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 63640066 is about 7977.4724067213. The cubic root of 63640066 is about 399.2487273569.

The spelling of 63640066 in words is "sixty-three million, six hundred forty thousand, sixty-six".