6641364671 has 4 divisors (see below), whose sum is σ = 6990910200. Its totient is φ = 6291819144.

The previous prime is 6641364649. The next prime is 6641364683. The reversal of 6641364671 is 1764631466.

It is a happy number.

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

It is not a de Polignac number, because 6641364671 - 2⁶ = 6641364607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6641364571) 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, 174772736 + ... + 174772773.

It is an arithmetic number, because the mean of its divisors is an integer number (1747727550).

Almost surely, 2^6641364671 is an apocalyptic number.

6641364671 is a deficient number, since it is larger than the sum of its proper divisors (349545529).

6641364671 is a wasteful number, since it uses less digits than its factorization.

6641364671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349545528.

The product of its digits is 435456, while the sum is 44.

The square root of 6641364671 is about 81494.5683527436. The cubic root of 6641364671 is about 1879.6880302283.

The spelling of 6641364671 in words is "six billion, six hundred forty-one million, three hundred sixty-four thousand, six hundred seventy-one".