6647633 has 4 divisors (see below), whose sum is σ = 6789120. Its totient is φ = 6506148.

The previous prime is 6647623. The next prime is 6647647. The reversal of 6647633 is 3367466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3367466 = 2 ⋅1683733.

It is a cyclic number.

It is not a de Polignac number, because 6647633 - 2⁶ = 6647569 is a prime.

It is a d-powerful number, because it can be written as 6² + 6⁶ + 4⁵ + 7⁶ + 6⁸ + 3⁹ + 3¹⁴ .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6647593 and 6647602.

It is not an unprimeable number, because it can be changed into a prime (6647623) 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 3 ways as a sum of consecutive naturals, for example, 70673 + ... + 70766.

It is an arithmetic number, because the mean of its divisors is an integer number (1697280).

Almost surely, 2^6647633 is an apocalyptic number.

It is an amenable number.

6647633 is a deficient number, since it is larger than the sum of its proper divisors (141487).

6647633 is a wasteful number, since it uses less digits than its factorization.

6647633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141486.

The product of its digits is 54432, while the sum is 35.

The square root of 6647633 is about 2578.3004091843. The cubic root of 6647633 is about 188.0279213849.

It can be divided in two parts, 66 and 47633, that multiplied together give a triangular number (3143778 = T₂₅₀₇).

The spelling of 6647633 in words is "six million, six hundred forty-seven thousand, six hundred thirty-three".