1001660599 has 2 divisors, whose sum is σ = 1001660600. Its totient is φ = 1001660598.

The previous prime is 1001660579. The next prime is 1001660617. The reversal of 1001660599 is 9950661001.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1001660599 - 2¹⁵ = 1001627831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001660579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500830299 + 500830300.

It is an arithmetic number, because the mean of its divisors is an integer number (500830300).

Almost surely, 2^1001660599 is an apocalyptic number.

1001660599 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001660599 is an equidigital number, since it uses as much as digits as its factorization.

1001660599 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 1001660599 is about 31649.0220859982. The cubic root of 1001660599 is about 1000.5532268836.

The spelling of 1001660599 in words is "one billion, one million, six hundred sixty thousand, five hundred ninety-nine".