1047666671 has 2 divisors, whose sum is σ = 1047666672. Its totient is φ = 1047666670.

The previous prime is 1047666661. The next prime is 1047666679. The reversal of 1047666671 is 1766667401.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1047666671 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1047666679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 523833335 + 523833336.

It is an arithmetic number, because the mean of its divisors is an integer number (523833336).

Almost surely, 2^1047666671 is an apocalyptic number.

1047666671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1047666671 is an equidigital number, since it uses as much as digits as its factorization.

1047666671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 1047666671 is about 32367.6794194456. The cubic root of 1047666671 is about 1015.6429136419.

The spelling of 1047666671 in words is "one billion, forty-seven million, six hundred sixty-six thousand, six hundred seventy-one".