1660433 has 2 divisors, whose sum is σ = 1660434. Its totient is φ = 1660432.

The previous prime is 1660423. The next prime is 1660457. The reversal of 1660433 is 3340661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1181569 + 478864 = 1087^2 + 692^2 .

It is a cyclic number.

It is not a de Polignac number, because 1660433 - 2⁸ = 1660177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1660399 and 1660408.

It is not a weakly prime, because it can be changed into another prime (1660423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830216 + 830217.

It is an arithmetic number, because the mean of its divisors is an integer number (830217).

2^1660433 is an apocalyptic number.

It is an amenable number.

1660433 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660433 is an equidigital number, since it uses as much as digits as its factorization.

1660433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 1660433 is about 1288.5778983049. The cubic root of 1660433 is about 118.4151088964.

The spelling of 1660433 in words is "one million, six hundred sixty thousand, four hundred thirty-three".