2066155776 has 180 divisors, whose sum is σ = 6329763132. Its totient is φ = 669855744.

The previous prime is 2066155771. The next prime is 2066155787. The reversal of 2066155776 is 6775516602.

2066155776 is a `hidden beast` number, since 2 + 0 + 66 + 15 + 577 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1401753600 + 664402176 = 37440^2 + 25776^2 .

It is not an unprimeable number, because it can be changed into a prime (2066155771) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 765886 + ... + 768578.

Almost surely, 2^2066155776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2066155776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3164881566).

2066155776 is an abundant number, since it is smaller than the sum of its proper divisors (4263607356).

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

2066155776 is an equidigital number, since it uses as much as digits as its factorization.

2066155776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2758 (or 2735 counting only the distinct ones).

The product of its (nonzero) digits is 529200, while the sum is 45.

The square root of 2066155776 is about 45454.9862611353. The cubic root of 2066155776 is about 1273.6624755764.

The spelling of 2066155776 in words is "two billion, sixty-six million, one hundred fifty-five thousand, seven hundred seventy-six".