6631440373 has 2 divisors, whose sum is σ = 6631440374. Its totient is φ = 6631440372.

The previous prime is 6631440341. The next prime is 6631440391. The reversal of 6631440373 is 3730441366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4222790289 + 2408650084 = 64983^2 + 49078^2 .

It is a cyclic number.

It is not a de Polignac number, because 6631440373 - 2⁵ = 6631440341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6631440973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3315720186 + 3315720187.

It is an arithmetic number, because the mean of its divisors is an integer number (3315720187).

Almost surely, 2^6631440373 is an apocalyptic number.

It is an amenable number.

6631440373 is a deficient number, since it is larger than the sum of its proper divisors (1).

6631440373 is an equidigital number, since it uses as much as digits as its factorization.

6631440373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 37.

The square root of 6631440373 is about 81433.6562669269. The cubic root of 6631440373 is about 1878.7512807923.

The spelling of 6631440373 in words is "six billion, six hundred thirty-one million, four hundred forty thousand, three hundred seventy-three".