20413665102666 has 64 divisors (see below), whose sum is σ = 45742256755200. Its totient is φ = 6020903208000.

The previous prime is 20413665102647. The next prime is 20413665102703. The reversal of 20413665102666 is 66620156631402.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25558876 + ... + 26345463.

It is an arithmetic number, because the mean of its divisors is an integer number (714722761800).

Almost surely, 2^{20413665102666} is an apocalyptic number.

20413665102666 is an abundant number, since it is smaller than the sum of its proper divisors (25328591652534).

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

20413665102666 is a wasteful number, since it uses less digits than its factorization.

20413665102666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51904515.

The product of its (nonzero) digits is 1866240, while the sum is 48.

The spelling of 20413665102666 in words is "twenty trillion, four hundred thirteen billion, six hundred sixty-five million, one hundred two thousand, six hundred sixty-six".