1660211239 has 2 divisors, whose sum is σ = 1660211240. Its totient is φ = 1660211238.

The previous prime is 1660211233. The next prime is 1660211243. The reversal of 1660211239 is 9321120661.

It is a strong prime.

It is an emirp because it is prime and its reverse (9321120661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1660211239 - 2¹¹ = 1660209191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1660211239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1660211233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830105619 + 830105620.

It is an arithmetic number, because the mean of its divisors is an integer number (830105620).

Almost surely, 2^1660211239 is an apocalyptic number.

1660211239 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660211239 is an equidigital number, since it uses as much as digits as its factorization.

1660211239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 1660211239 is about 40745.6898211332. The cubic root of 1660211239 is about 1184.0983697393.

The spelling of 1660211239 in words is "one billion, six hundred sixty million, two hundred eleven thousand, two hundred thirty-nine".