421178668 has 12 divisors (see below), whose sum is σ = 769109040. Its totient is φ = 201433232.

The previous prime is 421178663. The next prime is 421178731. The reversal of 421178668 is 866871124.

It is not an unprimeable number, because it can be changed into a prime (421178663) 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, 2288923 + ... + 2289106.

It is an arithmetic number, because the mean of its divisors is an integer number (64092420).

Almost surely, 2^421178668 is an apocalyptic number.

It is an amenable number.

421178668 is a deficient number, since it is larger than the sum of its proper divisors (347930372).

421178668 is a wasteful number, since it uses less digits than its factorization.

421178668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4578056 (or 4578054 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The square root of 421178668 is about 20522.6379396022. The cubic root of 421178668 is about 749.5871315761.

The spelling of 421178668 in words is "four hundred twenty-one million, one hundred seventy-eight thousand, six hundred sixty-eight".