406664143105121 has 16 divisors (see below), whose sum is σ = 448928292885120. Its totient is φ = 365288181751680.

The previous prime is 406664143105079. The next prime is 406664143105123. The reversal of 406664143105121 is 121501341466604.

It is not a de Polignac number, because 406664143105121 - 2⁴⁶ = 336295398927457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406664143105123) 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, 142117346 + ... + 144950571.

It is an arithmetic number, because the mean of its divisors is an integer number (28058018305320).

Almost surely, 2^{406664143105121} is an apocalyptic number.

It is an amenable number.

406664143105121 is a deficient number, since it is larger than the sum of its proper divisors (42264149779999).

406664143105121 is a wasteful number, since it uses less digits than its factorization.

406664143105121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287069464.

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 406664143105121 in words is "four hundred six trillion, six hundred sixty-four billion, one hundred forty-three million, one hundred five thousand, one hundred twenty-one".