641766667004 has 24 divisors (see below), whose sum is σ = 1189265988960. Its totient is φ = 301979879936.

The previous prime is 641766666977. The next prime is 641766667007. The reversal of 641766667004 is 400766667146.

641766667004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641766667007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312257 + ... + 1175175.

It is an arithmetic number, because the mean of its divisors is an integer number (49552749540).

Almost surely, 2^641766667004 is an apocalyptic number.

It is an amenable number.

641766667004 is a deficient number, since it is larger than the sum of its proper divisors (547499321956).

641766667004 is a wasteful number, since it uses less digits than its factorization.

641766667004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873877 (or 873875 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 53.

The spelling of 641766667004 in words is "six hundred forty-one billion, seven hundred sixty-six million, six hundred sixty-seven thousand, four".