3138666777 has 12 divisors (see below), whose sum is σ = 4534164180. Its totient is φ = 2092197888.

The previous prime is 3138666763. The next prime is 3138666833. The reversal of 3138666777 is 7776668313.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1594884096 + 1543782681 = 39936^2 + 39291^2 .

It is not a de Polignac number, because 3138666777 - 2⁷ = 3138666649 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (3138666577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93153 + ... + 122289.

It is an arithmetic number, because the mean of its divisors is an integer number (377847015).

Almost surely, 2^3138666777 is an apocalyptic number.

It is an amenable number.

3138666777 is a deficient number, since it is larger than the sum of its proper divisors (1395497403).

3138666777 is a wasteful number, since it uses less digits than its factorization.

3138666777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41112 (or 41109 counting only the distinct ones).

The product of its digits is 5334336, while the sum is 54.

The square root of 3138666777 is about 56023.8054491124. The cubic root of 3138666777 is about 1464.1370708912.

The spelling of 3138666777 in words is "three billion, one hundred thirty-eight million, six hundred sixty-six thousand, seven hundred seventy-seven".