2066808755421 has 48 divisors (see below), whose sum is σ = 3258085392000. Its totient is φ = 1294653275136.

The previous prime is 2066808755413. The next prime is 2066808755423. The reversal of 2066808755421 is 1245578086602.

2066808755421 is a `hidden beast` number, since 2 + 0 + 6 + 6 + 8 + 0 + 87 + 554 + 2 + 1 = 666.

It is not a de Polignac number, because 2066808755421 - 2³ = 2066808755413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066808755423) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4452901 + ... + 4895093.

It is an arithmetic number, because the mean of its divisors is an integer number (67876779000).

Almost surely, 2^{2066808755421} is an apocalyptic number.

It is an amenable number.

2066808755421 is a deficient number, since it is larger than the sum of its proper divisors (1191276636579).

2066808755421 is a wasteful number, since it uses less digits than its factorization.

2066808755421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442835 (or 442812 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 54.

The spelling of 2066808755421 in words is "two trillion, sixty-six billion, eight hundred eight million, seven hundred fifty-five thousand, four hundred twenty-one".