1001660605 has 8 divisors (see below), whose sum is σ = 1311264864. Its totient is φ = 728480400.

The previous prime is 1001660599. The next prime is 1001660617. The reversal of 1001660605 is 5060661001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1001660605 - 2¹⁹ = 1001136317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1001660605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9105951 + ... + 9106060.

It is an arithmetic number, because the mean of its divisors is an integer number (163908108).

Almost surely, 2^1001660605 is an apocalyptic number.

It is an amenable number.

1001660605 is a deficient number, since it is larger than the sum of its proper divisors (309604259).

1001660605 is a wasteful number, since it uses less digits than its factorization.

1001660605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18212027.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1001660605 is about 31649.0221807878. The cubic root of 1001660605 is about 1000.5532288814.

The spelling of 1001660605 in words is "one billion, one million, six hundred sixty thousand, six hundred five".