6506406 has 20 divisors (see below), whose sum is σ = 14579532. Its totient is φ = 2168748.

The previous prime is 6506399. The next prime is 6506429. The reversal of 6506406 is 6046056.

6506406 is a `hidden beast` number, since 650 + 6 + 4 + 0 + 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 6506406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 19920 + ... + 20243.

Almost surely, 2^6506406 is an apocalyptic number.

6506406 is an abundant number, since it is smaller than the sum of its proper divisors (8073126).

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

6506406 is a wasteful number, since it uses less digits than its factorization.

6506406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40177 (or 40168 counting only the distinct ones).

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

The square root of 6506406 is about 2550.7657673726. The cubic root of 6506406 is about 186.6868465995.

It can be divided in two parts, 650 and 6406, that added together give a square (7056 = 84²).

The spelling of 6506406 in words is "six million, five hundred six thousand, four hundred six".