6611409 has 16 divisors (see below), whose sum is σ = 11194240. Its totient is φ = 3777840.

The previous prime is 6611399. The next prime is 6611413. The reversal of 6611409 is 9041166.

6611409 is a `hidden beast` number, since 6 + 611 + 40 + 9 = 666.

It is not a de Polignac number, because 6611409 - 2⁴ = 6611393 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6611489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17302 + ... + 17679.

It is an arithmetic number, because the mean of its divisors is an integer number (699640).

Almost surely, 2^6611409 is an apocalyptic number.

It is an amenable number.

6611409 is a deficient number, since it is larger than the sum of its proper divisors (4582831).

6611409 is a wasteful number, since it uses less digits than its factorization.

6611409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34997 (or 34991 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 6611409 is about 2571.2660305772. The cubic root of 6611409 is about 187.6857678874.

The spelling of 6611409 in words is "six million, six hundred eleven thousand, four hundred nine".