6616536405 has 16 divisors (see below), whose sum is σ = 10731480000. Its totient is φ = 3480478848.

The previous prime is 6616536403. The next prime is 6616536413. The reversal of 6616536405 is 5046356166.

It is not a de Polignac number, because 6616536405 - 2¹ = 6616536403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6616536403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3020155 + ... + 3022344.

It is an arithmetic number, because the mean of its divisors is an integer number (670717500).

Almost surely, 2^6616536405 is an apocalyptic number.

It is an amenable number.

6616536405 is a deficient number, since it is larger than the sum of its proper divisors (4114943595).

6616536405 is a wasteful number, since it uses less digits than its factorization.

6616536405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6042580.

The product of its (nonzero) digits is 388800, while the sum is 42.

The square root of 6616536405 is about 81342.0949140112. The cubic root of 6616536405 is about 1877.3427455595.

The spelling of 6616536405 in words is "six billion, six hundred sixteen million, five hundred thirty-six thousand, four hundred five".