2780745966 has 24 divisors (see below), whose sum is σ = 6036947280. Its totient is φ = 925069536.

The previous prime is 2780745953. The next prime is 2780745967. The reversal of 2780745966 is 6695470872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2780745967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 144511 + ... + 162618.

It is an arithmetic number, because the mean of its divisors is an integer number (251539470).

Almost surely, 2^2780745966 is an apocalyptic number.

2780745966 is an abundant number, since it is smaller than the sum of its proper divisors (3256201314).

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

2780745966 is a wasteful number, since it uses less digits than its factorization.

2780745966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307640 (or 307637 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The square root of 2780745966 is about 52732.7788571776. The cubic root of 2780745966 is about 1406.2216239845.

The spelling of 2780745966 in words is "two billion, seven hundred eighty million, seven hundred forty-five thousand, nine hundred sixty-six".