6673821 has 32 divisors (see below), whose sum is σ = 11225088. Its totient is φ = 3426240.

The previous prime is 6673789. The next prime is 6673847. The reversal of 6673821 is 1283766.

It is not a de Polignac number, because 6673821 - 2⁵ = 6673789 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6673861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38491 + ... + 38663.

It is an arithmetic number, because the mean of its divisors is an integer number (350784).

Almost surely, 2^6673821 is an apocalyptic number.

It is an amenable number.

6673821 is a deficient number, since it is larger than the sum of its proper divisors (4551267).

6673821 is a wasteful number, since it uses less digits than its factorization.

6673821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361.

The product of its digits is 12096, while the sum is 33.

The square root of 6673821 is about 2583.3739566698. The cubic root of 6673821 is about 188.2745065616.

The spelling of 6673821 in words is "six million, six hundred seventy-three thousand, eight hundred twenty-one".