6406776 has 40 divisors (see below), whose sum is σ = 17946720. Its totient is φ = 2135376.

The previous prime is 6406759. The next prime is 6406787. The reversal of 6406776 is 6776046.

6406776 is a `hidden beast` number, since 640 + 6 + 7 + 7 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 6406776.

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, 4296 + ... + 5591.

It is an arithmetic number, because the mean of its divisors is an integer number (448668).

Almost surely, 2^6406776 is an apocalyptic number.

It is an amenable number.

6406776 is an abundant number, since it is smaller than the sum of its proper divisors (11539944).

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

6406776 is a wasteful number, since it uses less digits than its factorization.

6406776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9905 (or 9892 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 6406776 is about 2531.1609984353. The cubic root of 6406776 is about 185.7290539960.

The spelling of 6406776 in words is "six million, four hundred six thousand, seven hundred seventy-six".