6620019 has 16 divisors (see below), whose sum is σ = 10414080. Its totient is φ = 3660480.

The previous prime is 6620017. The next prime is 6620027. The reversal of 6620019 is 9100266.

It is not a de Polignac number, because 6620019 - 2¹ = 6620017 is a prime.

It is a super-2 number, since 2×6620019² = 87649303120722, which contains 22 as substring.

6620019 is a lucky 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, 4434 + ... + 5735.

It is an arithmetic number, because the mean of its divisors is an integer number (650880).

Almost surely, 2^6620019 is an apocalyptic number.

6620019 is a deficient number, since it is larger than the sum of its proper divisors (3794061).

6620019 is a wasteful number, since it uses less digits than its factorization.

6620019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10210.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 6620019 is about 2572.9397583309. The cubic root of 6620019 is about 187.7672065781.

The spelling of 6620019 in words is "six million, six hundred twenty thousand, nineteen".