6620555015 has 8 divisors (see below), whose sum is σ = 7959859728. Its totient is φ = 5286314880.

The previous prime is 6620554981. The next prime is 6620555027. The reversal of 6620555015 is 5105550266.

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

It is not a de Polignac number, because 6620555015 - 2¹⁸ = 6620292871 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 1263266 + ... + 1268495.

It is an arithmetic number, because the mean of its divisors is an integer number (994982466).

Almost surely, 2^6620555015 is an apocalyptic number.

6620555015 is a deficient number, since it is larger than the sum of its proper divisors (1339304713).

6620555015 is a wasteful number, since it uses less digits than its factorization.

6620555015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2532289.

The product of its (nonzero) digits is 45000, while the sum is 35.

The square root of 6620555015 is about 81366.7930730959. The cubic root of 6620555015 is about 1877.7227420318.

The spelling of 6620555015 in words is "six billion, six hundred twenty million, five hundred fifty-five thousand, fifteen".