5212106205666 has 32 divisors (see below), whose sum is σ = 10623116537280. Its totient is φ = 1704231756864.

The previous prime is 5212106205653. The next prime is 5212106205667. The reversal of 5212106205666 is 6665026012125.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (5212106205667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188340 + ... + 3234143.

It is an arithmetic number, because the mean of its divisors is an integer number (331972391790).

Almost surely, 2^{5212106205666} is an apocalyptic number.

5212106205666 is an abundant number, since it is smaller than the sum of its proper divisors (5411010331614).

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

5212106205666 is a wasteful number, since it uses less digits than its factorization.

5212106205666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3427330.

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 5212106205666 in words is "five trillion, two hundred twelve billion, one hundred six million, two hundred five thousand, six hundred sixty-six".