6620061 has 16 divisors (see below), whose sum is σ = 10137600. Its totient is φ = 3764208.

The previous prime is 6620059. The next prime is 6620083. The reversal of 6620061 is 1600266.

It is not a de Polignac number, because 6620061 - 2¹ = 6620059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6620011) 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 15 ways as a sum of consecutive naturals, for example, 4360 + ... + 5678.

It is an arithmetic number, because the mean of its divisors is an integer number (633600).

Almost surely, 2^6620061 is an apocalyptic number.

It is an amenable number.

6620061 is a deficient number, since it is larger than the sum of its proper divisors (3517539).

6620061 is a wasteful number, since it uses less digits than its factorization.

6620061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 6620061 is about 2572.9479201880. The cubic root of 6620061 is about 187.7676036669.

The spelling of 6620061 in words is "six million, six hundred twenty thousand, sixty-one".