2780550766 has 64 divisors (see below), whose sum is σ = 5117644800. Its totient is φ = 1131006240.

The previous prime is 2780550749. The next prime is 2780550781. The reversal of 2780550766 is 6670550872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1125865 + ... + 1128331.

It is an arithmetic number, because the mean of its divisors is an integer number (79963200).

Almost surely, 2^2780550766 is an apocalyptic number.

2780550766 is a deficient number, since it is larger than the sum of its proper divisors (2337094034).

2780550766 is a wasteful number, since it uses less digits than its factorization.

2780550766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2574 (or 2560 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 46.

The square root of 2780550766 is about 52730.9279834899. The cubic root of 2780550766 is about 1406.1887190389.

The spelling of 2780550766 in words is "two billion, seven hundred eighty million, five hundred fifty thousand, seven hundred sixty-six".