6421042612166 has 32 divisors (see below), whose sum is σ = 12031161381120. Its totient is φ = 2502279353376.

The previous prime is 6421042612163. The next prime is 6421042612217. The reversal of 6421042612166 is 6612162401246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421042612163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263274776 + ... + 263299163.

It is an arithmetic number, because the mean of its divisors is an integer number (375973793160).

Almost surely, 2^{6421042612166} is an apocalyptic number.

6421042612166 is a deficient number, since it is larger than the sum of its proper divisors (5610118768954).

6421042612166 is a wasteful number, since it uses less digits than its factorization.

6421042612166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526574028.

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 6421042612166 in words is "six trillion, four hundred twenty-one billion, forty-two million, six hundred twelve thousand, one hundred sixty-six".