8940066920561 has 16 divisors (see below), whose sum is σ = 10264613633280. Its totient is φ = 7627450786560.

The previous prime is 8940066920539. The next prime is 8940066920573. The reversal of 8940066920561 is 1650296600498.

It is a cyclic number.

It is not a de Polignac number, because 8940066920561 - 2⁴² = 4542020409457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8940066920497 and 8940066920506.

It is not an unprimeable number, because it can be changed into a prime (8940066920501) 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, 2108045 + ... + 4724826.

It is an arithmetic number, because the mean of its divisors is an integer number (641538352080).

Almost surely, 2^{8940066920561} is an apocalyptic number.

It is an amenable number.

8940066920561 is a deficient number, since it is larger than the sum of its proper divisors (1324546712719).

8940066920561 is a wasteful number, since it uses less digits than its factorization.

8940066920561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6833744.

The product of its (nonzero) digits is 5598720, while the sum is 56.

The spelling of 8940066920561 in words is "eight trillion, nine hundred forty billion, sixty-six million, nine hundred twenty thousand, five hundred sixty-one".