6406699 has 16 divisors (see below), whose sum is σ = 7202272. Its totient is φ = 5660928.

The previous prime is 6406691. The next prime is 6406717. The reversal of 6406699 is 9966046.

6406699 is nontrivially palindromic in base 3.

It is not a de Polignac number, because 6406699 - 2³ = 6406691 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (6406691) 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, 40729 + ... + 40885.

It is an arithmetic number, because the mean of its divisors is an integer number (450142).

Almost surely, 2^6406699 is an apocalyptic number.

6406699 is a deficient number, since it is larger than the sum of its proper divisors (795573).

6406699 is a wasteful number, since it uses less digits than its factorization.

6406699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 6406699 is about 2531.1457879782. The cubic root of 6406699 is about 185.7283099299.

The spelling of 6406699 in words is "six million, four hundred six thousand, six hundred ninety-nine".