663888379 has 8 divisors (see below), whose sum is σ = 827705088. Its totient is φ = 517315560.

The previous prime is 663888377. The next prime is 663888389. The reversal of 663888379 is 973888366.

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

It is a cyclic number.

It is not a de Polignac number, because 663888379 - 2¹ = 663888377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (663888377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4310887 + ... + 4311040.

It is an arithmetic number, because the mean of its divisors is an integer number (103463136).

Almost surely, 2^663888379 is an apocalyptic number.

663888379 is a deficient number, since it is larger than the sum of its proper divisors (163816709).

663888379 is a wasteful number, since it uses less digits than its factorization.

663888379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8621945.

The product of its digits is 10450944, while the sum is 58.

The square root of 663888379 is about 25766.0314949742. The cubic root of 663888379 is about 872.3652461408.

The spelling of 663888379 in words is "six hundred sixty-three million, eight hundred eighty-eight thousand, three hundred seventy-nine".