1001660659 has 2 divisors, whose sum is σ = 1001660660. Its totient is φ = 1001660658.

The previous prime is 1001660657. The next prime is 1001660713. The reversal of 1001660659 is 9560661001.

It is a weak prime.

It is an emirp because it is prime and its reverse (9560661001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1001660659 - 2¹ = 1001660657 is a prime.

Together with 1001660657, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1001660651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500830329 + 500830330.

It is an arithmetic number, because the mean of its divisors is an integer number (500830330).

Almost surely, 2^1001660659 is an apocalyptic number.

1001660659 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001660659 is an equidigital number, since it uses as much as digits as its factorization.

1001660659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 1001660659 is about 31649.0230338947. The cubic root of 1001660659 is about 1000.5532468615.

The spelling of 1001660659 in words is "one billion, one million, six hundred sixty thousand, six hundred fifty-nine".