6640704001 has 4 divisors (see below), whose sum is σ = 6648893104. Its totient is φ = 6632514900.

The previous prime is 6640703989. The next prime is 6640704013. The reversal of 6640704001 is 1004070466.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (6640703989) and next prime (6640704013).

It is a cyclic number.

It is not a de Polignac number, because 6640704001 - 2⁵ = 6640703969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6640704901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4093335 + ... + 4094956.

It is an arithmetic number, because the mean of its divisors is an integer number (1662223276).

Almost surely, 2^6640704001 is an apocalyptic number.

It is an amenable number.

6640704001 is a deficient number, since it is larger than the sum of its proper divisors (8189103).

6640704001 is an equidigital number, since it uses as much as digits as its factorization.

6640704001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8189102.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 6640704001 is about 81490.5147916001. The cubic root of 6640704001 is about 1879.6256989287.

Adding to 6640704001 its reverse (1004070466), we get a palindrome (7644774467).

The spelling of 6640704001 in words is "six billion, six hundred forty million, seven hundred four thousand, one".