405406504012066 has 16 divisors (see below), whose sum is σ = 608284916654688. Its totient is φ = 202644867808800.

The previous prime is 405406504012001. The next prime is 405406504012121. The reversal of 405406504012066 is 660210405604504.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312194446 + ... + 313490326.

It is an arithmetic number, because the mean of its divisors is an integer number (38017807290918).

Almost surely, 2^{405406504012066} is an apocalyptic number.

405406504012066 is a deficient number, since it is larger than the sum of its proper divisors (202878412642622).

405406504012066 is a wasteful number, since it uses less digits than its factorization.

405406504012066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340817.

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 405406504012066 in words is "four hundred five trillion, four hundred six billion, five hundred four million, twelve thousand, sixty-six".