6620359 has 4 divisors (see below), whose sum is σ = 6645240. Its totient is φ = 6595480.

The previous prime is 6620357. The next prime is 6620363. The reversal of 6620359 is 9530266.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9530266 = 2 ⋅4765133.

It is a cyclic number.

It is not a de Polignac number, because 6620359 - 2¹ = 6620357 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6620359.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6620351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12037 + ... + 12574.

It is an arithmetic number, because the mean of its divisors is an integer number (1661310).

Almost surely, 2^6620359 is an apocalyptic number.

6620359 is a deficient number, since it is larger than the sum of its proper divisors (24881).

6620359 is a wasteful number, since it uses less digits than its factorization.

6620359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24880.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 6620359 is about 2573.0058297641. The cubic root of 6620359 is about 187.7704210582.

The spelling of 6620359 in words is "six million, six hundred twenty thousand, three hundred fifty-nine".