210666341406 has 32 divisors (see below), whose sum is σ = 431362533888. Its totient is φ = 68552225280.

The previous prime is 210666341357. The next prime is 210666341437. The reversal of 210666341406 is 604143666012.

It is a congruent 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, 264510 + ... + 700926.

It is an arithmetic number, because the mean of its divisors is an integer number (13480079184).

Almost surely, 2^210666341406 is an apocalyptic number.

210666341406 is an abundant number, since it is smaller than the sum of its proper divisors (220696192482).

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

210666341406 is a wasteful number, since it uses less digits than its factorization.

210666341406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438336.

The product of its (nonzero) digits is 124416, while the sum is 39.

The spelling of 210666341406 in words is "two hundred ten billion, six hundred sixty-six million, three hundred forty-one thousand, four hundred six".