2780743066 has 16 divisors (see below), whose sum is σ = 4288909824. Its totient is φ = 1351195344.

The previous prime is 2780743061. The next prime is 2780743099. The reversal of 2780743066 is 6603470872.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2780743061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42091 + ... + 85633.

It is an arithmetic number, because the mean of its divisors is an integer number (268056864).

Almost surely, 2^2780743066 is an apocalyptic number.

2780743066 is a deficient number, since it is larger than the sum of its proper divisors (1508166758).

2780743066 is a wasteful number, since it uses less digits than its factorization.

2780743066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44445.

The product of its (nonzero) digits is 338688, while the sum is 43.

The square root of 2780743066 is about 52732.7513600419. The cubic root of 2780743066 is about 1406.2211351415.

The spelling of 2780743066 in words is "two billion, seven hundred eighty million, seven hundred forty-three thousand, sixty-six".