2065328778 has 8 divisors (see below), whose sum is σ = 4130657568. Its totient is φ = 688442924.

The previous prime is 2065328767. The next prime is 2065328791. The reversal of 2065328778 is 8778235602.

It is a sphenic number, since it is the product of 3 distinct primes.

2065328778 is an admirable number.

It is a super-2 number, since 2×2065328778² = 8531165922469946568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172110726 + ... + 172110737.

It is an arithmetic number, because the mean of its divisors is an integer number (516332196).

Almost surely, 2^2065328778 is an apocalyptic number.

2065328778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2065328778 is a wasteful number, since it uses less digits than its factorization.

2065328778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344221468.

The product of its (nonzero) digits is 1128960, while the sum is 48.

The square root of 2065328778 is about 45445.8884608938. Note that the first 3 decimals coincide. The cubic root of 2065328778 is about 1273.4925211620.

The spelling of 2065328778 in words is "two billion, sixty-five million, three hundred twenty-eight thousand, seven hundred seventy-eight".