6406667 has 6 divisors (see below), whose sum is σ = 6761988. Its totient is φ = 6069132.

The previous prime is 6406657. The next prime is 6406679. The reversal of 6406667 is 7666046.

It is not a de Polignac number, because 6406667 - 2¹⁰ = 6405643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6406657) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8513 + ... + 9234.

It is an arithmetic number, because the mean of its divisors is an integer number (1126998).

Almost surely, 2^6406667 is an apocalyptic number.

6406667 is a deficient number, since it is larger than the sum of its proper divisors (355321).

6406667 is a wasteful number, since it uses less digits than its factorization.

6406667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17785 (or 17766 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 6406667 is about 2531.1394667224. The cubic root of 6406667 is about 185.7280007059.

The spelling of 6406667 in words is "six million, four hundred six thousand, six hundred sixty-seven".