63668771 has 4 divisors (see below), whose sum is σ = 63835392. Its totient is φ = 63502152.

The previous prime is 63668747. The next prime is 63668779. The reversal of 63668771 is 17786636.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63668771 - 2¹⁴ = 63652387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63668779) 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, 82736 + ... + 83501.

It is an arithmetic number, because the mean of its divisors is an integer number (15958848).

Almost surely, 2^63668771 is an apocalyptic number.

63668771 is a deficient number, since it is larger than the sum of its proper divisors (166621).

63668771 is a wasteful number, since it uses less digits than its factorization.

63668771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166620.

The product of its digits is 254016, while the sum is 44.

The square root of 63668771 is about 7979.2713326469. The cubic root of 63668771 is about 399.3087456902.

The spelling of 63668771 in words is "sixty-three million, six hundred sixty-eight thousand, seven hundred seventy-one".