2066783858181 has 96 divisors (see below), whose sum is σ = 3886351472640. Its totient is φ = 1070213943744.

The previous prime is 2066783858159. The next prime is 2066783858197. The reversal of 2066783858181 is 1818583876602.

2066783858181 is a `hidden beast` number, since 2 + 0 + 6 + 6 + 78 + 385 + 8 + 181 = 666.

It is not a de Polignac number, because 2066783858181 - 2¹⁰ = 2066783857157 is a prime.

It is a super-2 number, since 2×2066783858181² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066783858101) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 646870 + ... + 2133543.

It is an arithmetic number, because the mean of its divisors is an integer number (40482827840).

Almost surely, 2^{2066783858181} is an apocalyptic number.

2066783858181 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2066783858181 is a deficient number, since it is larger than the sum of its proper divisors (1819567614459).

2066783858181 is a wasteful number, since it uses less digits than its factorization.

2066783858181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2780477 (or 2780465 counting only the distinct ones).

The product of its (nonzero) digits is 30965760, while the sum is 63.

The spelling of 2066783858181 in words is "two trillion, sixty-six billion, seven hundred eighty-three million, eight hundred fifty-eight thousand, one hundred eighty-one".