1660037 has 2 divisors, whose sum is σ = 1660038. Its totient is φ = 1660036.

The previous prime is 1660007. The next prime is 1660039. The reversal of 1660037 is 7300661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1653796 + 6241 = 1286^2 + 79^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1660037 is a prime.

Together with 1660039, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1659994 and 1660021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1660039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 830018 + 830019.

It is an arithmetic number, because the mean of its divisors is an integer number (830019).

2^1660037 is an apocalyptic number.

It is an amenable number.

1660037 is a deficient number, since it is larger than the sum of its proper divisors (1).

1660037 is an equidigital number, since it uses as much as digits as its factorization.

1660037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 1660037 is about 1288.4242313772. The cubic root of 1660037 is about 118.4056944622.

Adding to 1660037 its reverse (7300661), we get a palindrome (8960698).

The spelling of 1660037 in words is "one million, six hundred sixty thousand, thirty-seven".