6620279 has 8 divisors (see below), whose sum is σ = 6850560. Its totient is φ = 6393816.

The previous prime is 6620261. The next prime is 6620281. The reversal of 6620279 is 9720266.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6620279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6620209) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 2822 + ... + 4604.

It is an arithmetic number, because the mean of its divisors is an integer number (856320).

Almost surely, 2^6620279 is an apocalyptic number.

6620279 is a deficient number, since it is larger than the sum of its proper divisors (230281).

6620279 is a wasteful number, since it uses less digits than its factorization.

6620279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 6620279 is about 2572.9902836972. The cubic root of 6620279 is about 187.7696647198.

The spelling of 6620279 in words is "six million, six hundred twenty thousand, two hundred seventy-nine".