2066534778 has 32 divisors (see below), whose sum is σ = 5152919040. Its totient is φ = 536762160.

The previous prime is 2066534761. The next prime is 2066534783. The reversal of 2066534778 is 8774356602.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2236048 + ... + 2236971.

It is an arithmetic number, because the mean of its divisors is an integer number (161028720).

Almost surely, 2^2066534778 is an apocalyptic number.

2066534778 is an abundant number, since it is smaller than the sum of its proper divisors (3086384262).

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

2066534778 is a wasteful number, since it uses less digits than its factorization.

2066534778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4473042.

The product of its (nonzero) digits is 1693440, while the sum is 48.

The square root of 2066534778 is about 45459.1550515405. The cubic root of 2066534778 is about 1273.7403482322.

The spelling of 2066534778 in words is "two billion, sixty-six million, five hundred thirty-four thousand, seven hundred seventy-eight".