6666045437 has 2 divisors, whose sum is σ = 6666045438. Its totient is φ = 6666045436.

The previous prime is 6666045409. The next prime is 6666045493. The reversal of 6666045437 is 7345406666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5309891161 + 1356154276 = 72869^2 + 36826^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6666045437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6666045391 and 6666045400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6666045497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333022718 + 3333022719.

It is an arithmetic number, because the mean of its divisors is an integer number (3333022719).

Almost surely, 2^6666045437 is an apocalyptic number.

It is an amenable number.

6666045437 is a deficient number, since it is larger than the sum of its proper divisors (1).

6666045437 is an equidigital number, since it uses as much as digits as its factorization.

6666045437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2177280, while the sum is 47.

The square root of 6666045437 is about 81645.8537649035. The cubic root of 6666045437 is about 1882.0135959963.

The spelling of 6666045437 in words is "six billion, six hundred sixty-six million, forty-five thousand, four hundred thirty-seven".