2785666307913 has 20 divisors (see below), whose sum is σ = 4342230254208. Its totient is φ = 1776366919800.

The previous prime is 2785666307863. The next prime is 2785666307923. The reversal of 2785666307913 is 3197036665872.

It is not a de Polignac number, because 2785666307913 - 2¹² = 2785666303817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2785666307923) 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 19 ways as a sum of consecutive naturals, for example, 747627313 + ... + 747631038.

Almost surely, 2^{2785666307913} is an apocalyptic number.

2785666307913 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2785666307913 is a deficient number, since it is larger than the sum of its proper divisors (1556563946295).

2785666307913 is a wasteful number, since it uses less digits than its factorization.

2785666307913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495258386 (or 1495258377 counting only the distinct ones).

The product of its (nonzero) digits is 68584320, while the sum is 63.

The spelling of 2785666307913 in words is "two trillion, seven hundred eighty-five billion, six hundred sixty-six million, three hundred seven thousand, nine hundred thirteen".