1660942271 has 2 divisors, whose sum is σ = 1660942272. Its totient is φ = 1660942270.

The previous prime is 1660942237. The next prime is 1660942277. The reversal of 1660942271 is 1722490661.

It is a strong prime.

It is an emirp because it is prime and its reverse (1722490661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1660942271 - 2¹⁸ = 1660680127 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 (1660942277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830471135 + 830471136.

It is an arithmetic number, because the mean of its divisors is an integer number (830471136).

Almost surely, 2^1660942271 is an apocalyptic number.

1660942271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660942271 is an equidigital number, since it uses as much as digits as its factorization.

1660942271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 1660942271 is about 40754.6595004792. The cubic root of 1660942271 is about 1184.2721401527.

The spelling of 1660942271 in words is "one billion, six hundred sixty million, nine hundred forty-two thousand, two hundred seventy-one".