6620055 has 32 divisors (see below), whose sum is σ = 12083904. Its totient is φ = 3065856.

The previous prime is 6620039. The next prime is 6620057. The reversal of 6620055 is 5500266.

6620055 = T₈₇₄ + T₈₇₅ + ... + T₈₉₀.

It is not a de Polignac number, because 6620055 - 2⁴ = 6620039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6620057) 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 31 ways as a sum of consecutive naturals, for example, 2317 + ... + 4313.

It is an arithmetic number, because the mean of its divisors is an integer number (377622).

Almost surely, 2^6620055 is an apocalyptic number.

6620055 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6620055 is a deficient number, since it is larger than the sum of its proper divisors (5463849).

6620055 is a wasteful number, since it uses less digits than its factorization.

6620055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2035.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 6620055 is about 2572.9467542100. The cubic root of 6620055 is about 187.7675469400.

The spelling of 6620055 in words is "six million, six hundred twenty thousand, fifty-five".