6620651155 has 8 divisors (see below), whose sum is σ = 7966083312. Its totient is φ = 5282319648.

The previous prime is 6620651153. The next prime is 6620651179. The reversal of 6620651155 is 5511560266.

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 6620651155 - 2¹ = 6620651153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6620651153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1773109 + ... + 1776838.

It is an arithmetic number, because the mean of its divisors is an integer number (995760414).

Almost surely, 2^6620651155 is an apocalyptic number.

6620651155 is a deficient number, since it is larger than the sum of its proper divisors (1345432157).

6620651155 is a wasteful number, since it uses less digits than its factorization.

6620651155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3550325.

The product of its (nonzero) digits is 54000, while the sum is 37.

The square root of 6620651155 is about 81367.3838524995. The cubic root of 6620651155 is about 1877.7318310679.

The spelling of 6620651155 in words is "six billion, six hundred twenty million, six hundred fifty-one thousand, one hundred fifty-five".