6620015015 has 4 divisors (see below), whose sum is σ = 7944018024. Its totient is φ = 5296012008.

The previous prime is 6620014963. The next prime is 6620015023. The reversal of 6620015015 is 5105100266.

6620015015 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6620015015 - 2¹⁸ = 6619752871 is a prime.

It is a Duffinian number.

6620015015 is a modest number, since divided by 15015 gives 6620 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662001497 + ... + 662001506.

It is an arithmetic number, because the mean of its divisors is an integer number (1986004506).

Almost surely, 2^6620015015 is an apocalyptic number.

6620015015 is a deficient number, since it is larger than the sum of its proper divisors (1324003009).

6620015015 is a wasteful number, since it uses less digits than its factorization.

6620015015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324003008.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 6620015015 is about 81363.4746984173. The cubic root of 6620015015 is about 1877.6716890185.

The spelling of 6620015015 in words is "six billion, six hundred twenty million, fifteen thousand, fifteen".