6620161003 has 8 divisors (see below), whose sum is σ = 6639050736. Its totient is φ = 6601296000.

The previous prime is 6620160997. The next prime is 6620161007. The reversal of 6620161003 is 3001610266.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6620161003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6620161007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 616228 + ... + 626878.

It is an arithmetic number, because the mean of its divisors is an integer number (829881342).

Almost surely, 2^6620161003 is an apocalyptic number.

6620161003 is a deficient number, since it is larger than the sum of its proper divisors (18889733).

6620161003 is a wasteful number, since it uses less digits than its factorization.

6620161003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12365.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 6620161003 is about 81364.3718282148. The cubic root of 6620161003 is about 1877.6854913799.

Adding to 6620161003 its reverse (3001610266), we get a palindrome (9621771269).

The spelling of 6620161003 in words is "six billion, six hundred twenty million, one hundred sixty-one thousand, three".