641051340666 has 32 divisors (see below), whose sum is σ = 1399361660928. Its totient is φ = 194160177840.

The previous prime is 641051340623. The next prime is 641051340689. The reversal of 641051340666 is 666043150146.

641051340666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2312970 + ... + 2575253.

It is an arithmetic number, because the mean of its divisors is an integer number (43730051904).

Almost surely, 2^641051340666 is an apocalyptic number.

641051340666 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

641051340666 is an abundant number, since it is smaller than the sum of its proper divisors (758310320262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641051340666 is a wasteful number, since it uses less digits than its factorization.

641051340666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4890226.

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 641051340666 in words is "six hundred forty-one billion, fifty-one million, three hundred forty thousand, six hundred sixty-six".