8401663 has 8 divisors (see below), whose sum is σ = 8550000. Its totient is φ = 8254848.

The previous prime is 8401661. The next prime is 8401681. The reversal of 8401663 is 3661048.

8401663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 8401663 - 2¹ = 8401661 is a prime.

It is a Duffinian number.

8401663 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8401661) 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, 16588 + ... + 17086.

It is an arithmetic number, because the mean of its divisors is an integer number (1068750).

Almost surely, 2^8401663 is an apocalyptic number.

8401663 is a deficient number, since it is larger than the sum of its proper divisors (148337).

8401663 is a wasteful number, since it uses less digits than its factorization.

8401663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 8401663 is about 2898.5622297960. The cubic root of 8401663 is about 203.2926852964.

The spelling of 8401663 in words is "eight million, four hundred one thousand, six hundred sixty-three".