6640364501 has 4 divisors (see below), whose sum is σ = 6643923072. Its totient is φ = 6636805932.

The previous prime is 6640364449. The next prime is 6640364519. The reversal of 6640364501 is 1054630466.

6640364501 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6640364501 is a prime.

It is a super-2 number, since 2×6640364501² = 88188881412281958002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640364561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1776485 + ... + 1780218.

It is an arithmetic number, because the mean of its divisors is an integer number (1660980768).

Almost surely, 2^6640364501 is an apocalyptic number.

It is an amenable number.

6640364501 is a deficient number, since it is larger than the sum of its proper divisors (3558571).

6640364501 is a wasteful number, since it uses less digits than its factorization.

6640364501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3558570.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 6640364501 is about 81488.4317004567. The cubic root of 6640364501 is about 1879.5936669936.

Adding to 6640364501 its reverse (1054630466), we get a palindrome (7694994967).

The spelling of 6640364501 in words is "six billion, six hundred forty million, three hundred sixty-four thousand, five hundred one".