6620722 has 8 divisors (see below), whose sum is σ = 9946476. Its totient is φ = 3305232.

The previous prime is 6620717. The next prime is 6620741. The reversal of 6620722 is 2270266.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6558721 + 62001 = 2561^2 + 249^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 673 + ... + 3700.

Almost surely, 2^6620722 is an apocalyptic number.

6620722 is a deficient number, since it is larger than the sum of its proper divisors (3325754).

6620722 is a wasteful number, since it uses less digits than its factorization.

6620722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5132.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 6620722 is about 2573.0763688628. The cubic root of 6620722 is about 187.7738528669.

Adding to 6620722 its reverse (2270266), we get a palindrome (8890988).

The spelling of 6620722 in words is "six million, six hundred twenty thousand, seven hundred twenty-two".