421776663 has 48 divisors (see below), whose sum is σ = 725915520. Its totient is φ = 215342400.

The previous prime is 421776659. The next prime is 421776671. The reversal of 421776663 is 366677124.

It is a happy number.

It is not a de Polignac number, because 421776663 - 2² = 421776659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421776643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 93193 + ... + 97613.

It is an arithmetic number, because the mean of its divisors is an integer number (15123240).

Almost surely, 2^421776663 is an apocalyptic number.

421776663 is a deficient number, since it is larger than the sum of its proper divisors (304138857).

421776663 is a wasteful number, since it uses less digits than its factorization.

421776663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4508 (or 4501 counting only the distinct ones).

The product of its digits is 254016, while the sum is 42.

The square root of 421776663 is about 20537.2019272344. The cubic root of 421776663 is about 749.9417216939.

The spelling of 421776663 in words is "four hundred twenty-one million, seven hundred seventy-six thousand, six hundred sixty-three".