1606556671 has 2 divisors, whose sum is σ = 1606556672. Its totient is φ = 1606556670.

The previous prime is 1606556657. The next prime is 1606556681. The reversal of 1606556671 is 1766556061.

It is a strong prime.

It is an emirp because it is prime and its reverse (1766556061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1606556671 - 2⁵ = 1606556639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1606556641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803278335 + 803278336.

It is an arithmetic number, because the mean of its divisors is an integer number (803278336).

Almost surely, 2^1606556671 is an apocalyptic number.

1606556671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606556671 is an equidigital number, since it uses as much as digits as its factorization.

1606556671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 1606556671 is about 40081.8745943849. The cubic root of 1606556671 is about 1171.2025697495.

The spelling of 1606556671 in words is "one billion, six hundred six million, five hundred fifty-six thousand, six hundred seventy-one".