6620105 has 8 divisors (see below), whose sum is σ = 8015112. Its totient is φ = 5248768.

The previous prime is 6620101. The next prime is 6620171. The reversal of 6620105 is 5010266.

It can be written as a sum of positive squares in 4 ways, for example, as 840889 + 5779216 = 917^2 + 2404^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6620105 - 2² = 6620101 is a prime.

It is a super-2 number, since 2×6620105² = 87651580422050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6620101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5294 + ... + 6423.

It is an arithmetic number, because the mean of its divisors is an integer number (1001889).

Almost surely, 2^6620105 is an apocalyptic number.

It is an amenable number.

6620105 is a deficient number, since it is larger than the sum of its proper divisors (1395007).

6620105 is a wasteful number, since it uses less digits than its factorization.

6620105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11835.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 6620105 is about 2572.9564706773. The cubic root of 6620105 is about 187.7680196629.

The spelling of 6620105 in words is "six million, six hundred twenty thousand, one hundred five".