6402663 has 12 divisors (see below), whose sum is σ = 9280128. Its totient is φ = 4253760.

The previous prime is 6402661. The next prime is 6402701. The reversal of 6402663 is 3662046.

6402663 is nontrivially palindromic in base 6.

It is not a de Polignac number, because 6402663 - 2¹ = 6402661 is a prime.

6402663 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6402661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1978 + ... + 4088.

It is an arithmetic number, because the mean of its divisors is an integer number (773344).

Almost surely, 2^6402663 is an apocalyptic number.

6402663 is a deficient number, since it is larger than the sum of its proper divisors (2877465).

6402663 is a wasteful number, since it uses less digits than its factorization.

6402663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2454 (or 2451 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 6402663 is about 2530.3483949844. The cubic root of 6402663 is about 185.6893009218.

The spelling of 6402663 in words is "six million, four hundred two thousand, six hundred sixty-three".