6620385455 has 8 divisors (see below), whose sum is σ = 8113493952. Its totient is φ = 5183620768.

The previous prime is 6620385419. The next prime is 6620385487. The reversal of 6620385455 is 5545830266.

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

It is a cyclic number.

It is not a de Polignac number, because 6620385455 - 2⁶ = 6620385391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14085692 + ... + 14086161.

It is an arithmetic number, because the mean of its divisors is an integer number (1014186744).

Almost surely, 2^6620385455 is an apocalyptic number.

6620385455 is a deficient number, since it is larger than the sum of its proper divisors (1493108497).

6620385455 is a wasteful number, since it uses less digits than its factorization.

6620385455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28171905.

The product of its (nonzero) digits is 864000, while the sum is 44.

The square root of 6620385455 is about 81365.7511180226. The cubic root of 6620385455 is about 1877.7067116846.

The spelling of 6620385455 in words is "six billion, six hundred twenty million, three hundred eighty-five thousand, four hundred fifty-five".