6720106 has 4 divisors (see below), whose sum is σ = 10080162. Its totient is φ = 3360052.

The previous prime is 6720089. The next prime is 6720143. The reversal of 6720106 is 6010276.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4239481 + 2480625 = 2059^2 + 1575^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1680025 + ... + 1680028.

Almost surely, 2^6720106 is an apocalyptic number.

6720106 is a deficient number, since it is larger than the sum of its proper divisors (3360056).

6720106 is a wasteful number, since it uses less digits than its factorization.

6720106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3360055.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 6720106 is about 2592.3167244764. The cubic root of 6720106 is about 188.7087514209.

The spelling of 6720106 in words is "six million, seven hundred twenty thousand, one hundred six".