2040777866 has 4 divisors (see below), whose sum is σ = 3061166802. Its totient is φ = 1020388932.

The previous prime is 2040777847. The next prime is 2040777889. The reversal of 2040777866 is 6687770402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6687770402 = 2 ⋅3343885201.

It can be written as a sum of positive squares in only one way, i.e., 1683378841 + 357399025 = 41029^2 + 18905^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2040777866.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510194465 + ... + 510194468.

Almost surely, 2^2040777866 is an apocalyptic number.

2040777866 is a deficient number, since it is larger than the sum of its proper divisors (1020388936).

2040777866 is a wasteful number, since it uses less digits than its factorization.

2040777866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020388935.

The product of its (nonzero) digits is 790272, while the sum is 47.

The square root of 2040777866 is about 45174.9694631884. The cubic root of 2040777866 is about 1268.4263199932.

The spelling of 2040777866 in words is "two billion, forty million, seven hundred seventy-seven thousand, eight hundred sixty-six".