6499669 has 8 divisors (see below), whose sum is σ = 7132320. Its totient is φ = 5874000.

The previous prime is 6499667. The next prime is 6499673. The reversal of 6499669 is 9669946.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6499669 - 2¹ = 6499667 is a prime.

It is a super-2 number, since 2×6499669² = 84491394219122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6499663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319 + ... + 3619.

It is an arithmetic number, because the mean of its divisors is an integer number (891540).

Almost surely, 2^6499669 is an apocalyptic number.

It is an amenable number.

6499669 is a deficient number, since it is larger than the sum of its proper divisors (632651).

6499669 is a wasteful number, since it uses less digits than its factorization.

6499669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3491.

The product of its digits is 629856, while the sum is 49.

The square root of 6499669 is about 2549.4448415292. Note that the first 3 decimals coincide. The cubic root of 6499669 is about 186.6223899379.

The spelling of 6499669 in words is "six million, four hundred ninety-nine thousand, six hundred sixty-nine".