6640116015 has 64 divisors (see below), whose sum is σ = 11806212096. Its totient is φ = 3165599232.

The previous prime is 6640115981. The next prime is 6640116019. The reversal of 6640116015 is 5106110466.

It is not a de Polignac number, because 6640116015 - 2⁷ = 6640115887 is a prime.

It is a super-2 number, since 2×6640116015² = 88182281385318960450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640116019) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1606882 + ... + 1611008.

It is an arithmetic number, because the mean of its divisors is an integer number (184472064).

Almost surely, 2^6640116015 is an apocalyptic number.

6640116015 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

6640116015 is a deficient number, since it is larger than the sum of its proper divisors (5166096081).

6640116015 is a wasteful number, since it uses less digits than its factorization.

6640116015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4408.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 6640116015 is about 81486.9070157900. The cubic root of 6640116015 is about 1879.5702215669.

The spelling of 6640116015 in words is "six billion, six hundred forty million, one hundred sixteen thousand, fifteen".