6616261311 has 16 divisors (see below), whose sum is σ = 9628806528. Its totient is φ = 4007708000.

The previous prime is 6616261271. The next prime is 6616261363. The reversal of 6616261311 is 1131626166.

It is a cyclic number.

It is not a de Polignac number, because 6616261311 - 2¹¹ = 6616259263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6616261391) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 10000 + ... + 115466.

It is an arithmetic number, because the mean of its divisors is an integer number (601800408).

Almost surely, 2^6616261311 is an apocalyptic number.

6616261311 is a deficient number, since it is larger than the sum of its proper divisors (3012545217).

6616261311 is a wasteful number, since it uses less digits than its factorization.

6616261311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107382.

The product of its digits is 7776, while the sum is 33.

The square root of 6616261311 is about 81340.4039269538. The cubic root of 6616261311 is about 1877.3167272698.

Adding to 6616261311 its reverse (1131626166), we get a palindrome (7747887477).

The spelling of 6616261311 in words is "six billion, six hundred sixteen million, two hundred sixty-one thousand, three hundred eleven".