1660804543 has 2 divisors, whose sum is σ = 1660804544. Its totient is φ = 1660804542.

The previous prime is 1660804529. The next prime is 1660804553. The reversal of 1660804543 is 3454080661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1660804543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1660804553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830402271 + 830402272.

It is an arithmetic number, because the mean of its divisors is an integer number (830402272).

Almost surely, 2^1660804543 is an apocalyptic number.

1660804543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660804543 is an equidigital number, since it uses as much as digits as its factorization.

1660804543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 1660804543 is about 40752.9697445475. The cubic root of 1660804543 is about 1184.2394053321.

The spelling of 1660804543 in words is "one billion, six hundred sixty million, eight hundred four thousand, five hundred forty-three".