6640830067 has 4 divisors (see below), whose sum is σ = 6641068176. Its totient is φ = 6640591960.

The previous prime is 6640829977. The next prime is 6640830101. The reversal of 6640830067 is 7600380466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6640830067 - 2¹⁵ = 6640797299 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6640830167) 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 3 ways as a sum of consecutive naturals, for example, 70663 + ... + 135184.

It is an arithmetic number, because the mean of its divisors is an integer number (1660267044).

Almost surely, 2^6640830067 is an apocalyptic number.

6640830067 is a deficient number, since it is larger than the sum of its proper divisors (238109).

6640830067 is a wasteful number, since it uses less digits than its factorization.

6640830067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238108.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 6640830067 is about 81491.2882889944. The cubic root of 6640830067 is about 1879.6375930188.

The spelling of 6640830067 in words is "six billion, six hundred forty million, eight hundred thirty thousand, sixty-seven".