6664640414091 has 32 divisors (see below), whose sum is σ = 10082079110400. Its totient is φ = 3880565539200.

The previous prime is 6664640414087. The next prime is 6664640414153. The reversal of 6664640414091 is 1904140464666.

It is a happy number.

It is not a de Polignac number, because 6664640414091 - 2² = 6664640414087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6664640410091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38411116 + ... + 38584233.

It is an arithmetic number, because the mean of its divisors is an integer number (315064972200).

Almost surely, 2^{6664640414091} is an apocalyptic number.

6664640414091 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

6664640414091 is a deficient number, since it is larger than the sum of its proper divisors (3417438696309).

6664640414091 is a wasteful number, since it uses less digits than its factorization.

6664640414091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76995467.

The product of its (nonzero) digits is 2985984, while the sum is 51.

The spelling of 6664640414091 in words is "six trillion, six hundred sixty-four billion, six hundred forty million, four hundred fourteen thousand, ninety-one".