6331994077 has 2 divisors, whose sum is σ = 6331994078. Its totient is φ = 6331994076.

The previous prime is 6331994051. The next prime is 6331994083. The reversal of 6331994077 is 7704991336.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6225367801 + 106626276 = 78901^2 + 10326^2 .

It is a cyclic number.

It is not a de Polignac number, because 6331994077 - 2¹⁹ = 6331469789 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6331994077.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6331994027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3165997038 + 3165997039.

It is an arithmetic number, because the mean of its divisors is an integer number (3165997039).

Almost surely, 2^6331994077 is an apocalyptic number.

It is an amenable number.

6331994077 is a deficient number, since it is larger than the sum of its proper divisors (1).

6331994077 is an equidigital number, since it uses as much as digits as its factorization.

6331994077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 857304, while the sum is 49.

The square root of 6331994077 is about 79573.8278393091. The cubic root of 6331994077 is about 1850.0359454423.

The spelling of 6331994077 in words is "six billion, three hundred thirty-one million, nine hundred ninety-four thousand, seventy-seven".