12456434415666 has 32 divisors (see below), whose sum is σ = 25263561504960. Its totient is φ = 4094076801024.

The previous prime is 12456434415647. The next prime is 12456434415727. The reversal of 12456434415666 is 66651443465421.

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, 47465836 + ... + 47727543.

It is an arithmetic number, because the mean of its divisors is an integer number (789486297030).

Almost surely, 2^{12456434415666} is an apocalyptic number.

12456434415666 is an abundant number, since it is smaller than the sum of its proper divisors (12807127089294).

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

12456434415666 is a wasteful number, since it uses less digits than its factorization.

12456434415666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95193690.

The product of its digits is 49766400, while the sum is 57.

The spelling of 12456434415666 in words is "twelve trillion, four hundred fifty-six billion, four hundred thirty-four million, four hundred fifteen thousand, six hundred sixty-six".