641666041260 has 24 divisors (see below), whose sum is σ = 1796664915696. Its totient is φ = 171110944320.

The previous prime is 641666041253. The next prime is 641666041297. The reversal of 641666041260 is 62140666146.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5347216951 + ... + 5347217070.

It is an arithmetic number, because the mean of its divisors is an integer number (74861038154).

Almost surely, 2^641666041260 is an apocalyptic number.

641666041260 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

641666041260 is an abundant number, since it is smaller than the sum of its proper divisors (1154998874436).

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

641666041260 is a wasteful number, since it uses less digits than its factorization.

641666041260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10694434033 (or 10694434031 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 42.

The spelling of 641666041260 in words is "six hundred forty-one billion, six hundred sixty-six million, forty-one thousand, two hundred sixty".