6640444495 has 8 divisors (see below), whose sum is σ = 7976953584. Its totient is φ = 5306742144.

The previous prime is 6640444457. The next prime is 6640444507. The reversal of 6640444495 is 5944440466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6640444495 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 696474 + ... + 705943.

It is an arithmetic number, because the mean of its divisors is an integer number (997119198).

Almost surely, 2^6640444495 is an apocalyptic number.

6640444495 is a deficient number, since it is larger than the sum of its proper divisors (1336509089).

6640444495 is a wasteful number, since it uses less digits than its factorization.

6640444495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403369.

The product of its (nonzero) digits is 1658880, while the sum is 46.

The square root of 6640444495 is about 81488.9225293843. The cubic root of 6640444495 is about 1879.6012145518.

The spelling of 6640444495 in words is "six billion, six hundred forty million, four hundred forty-four thousand, four hundred ninety-five".