39786666668889 has 24 divisors (see below), whose sum is σ = 61710557614848. Its totient is φ = 22735007598240.

The previous prime is 39786666668851. The next prime is 39786666668891. The reversal of 39786666668889 is 98886666668793.

It is not a de Polignac number, because 39786666668889 - 2⁹ = 39786666668377 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39786666668796 and 39786666668805.

It is not an unprimeable number, because it can be changed into a prime (39786666668839) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13740984 + ... + 16382550.

It is an arithmetic number, because the mean of its divisors is an integer number (2571273233952).

Almost surely, 2^{39786666668889} is an apocalyptic number.

It is an amenable number.

39786666668889 is a deficient number, since it is larger than the sum of its proper divisors (21923890945959).

39786666668889 is a wasteful number, since it uses less digits than its factorization.

39786666668889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2744045 (or 2744038 counting only the distinct ones).

The product of its digits is 325066162176, while the sum is 96.

Subtracting from 39786666668889 its sum of digits (96), we obtain a palindrome (39786666668793).

The spelling of 39786666668889 in words is "thirty-nine trillion, seven hundred eighty-six billion, six hundred sixty-six million, six hundred sixty-eight thousand, eight hundred eighty-nine".