6647473 has 16 divisors (see below), whose sum is σ = 8074240. Its totient is φ = 5346000.

The previous prime is 6647447. The next prime is 6647489. The reversal of 6647473 is 3747466.

It is a cyclic number.

It is not a de Polignac number, because 6647473 - 2¹⁷ = 6516401 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 6⁴ + 6⁸ + 4³ + 7³ + 4⁸ + 7⁶ + 3¹⁴ .

It is not an unprimeable number, because it can be changed into a prime (6647273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19918 + ... + 20248.

It is an arithmetic number, because the mean of its divisors is an integer number (504640).

Almost surely, 2^6647473 is an apocalyptic number.

It is an amenable number.

6647473 is a deficient number, since it is larger than the sum of its proper divisors (1426767).

6647473 is a wasteful number, since it uses less digits than its factorization.

6647473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508.

The product of its digits is 84672, while the sum is 37.

The square root of 6647473 is about 2578.2693808057. The cubic root of 6647473 is about 188.0264128425.

The spelling of 6647473 in words is "six million, six hundred forty-seven thousand, four hundred seventy-three".