6406506 has 32 divisors (see below), whose sum is σ = 14731200. Its totient is φ = 2061360.

The previous prime is 6406493. The next prime is 6406507. The reversal of 6406506 is 6056046.

6406506 is a `hidden beast` number, since 6 + 4 + 0 + 650 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 6406506.

It is not an unprimeable number, because it can be changed into a prime (6406507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480 + ... + 3611.

It is an arithmetic number, because the mean of its divisors is an integer number (460350).

Almost surely, 2^6406506 is an apocalyptic number.

6406506 is an abundant number, since it is smaller than the sum of its proper divisors (8324694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6406506 is a wasteful number, since it uses less digits than its factorization.

6406506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4131 (or 4125 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 6406506 is about 2531.1076626647. The cubic root of 6406506 is about 185.7264449069.

The spelling of 6406506 in words is "six million, four hundred six thousand, five hundred six".