1600660001 has 4 divisors (see below), whose sum is σ = 1620921600. Its totient is φ = 1580398404.

The previous prime is 1600659937. The next prime is 1600660003. The reversal of 1600660001 is 1000660061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1600660001 - 2⁶ = 1600659937 is a prime.

It is a super-2 number, since 2×1600660001² = 5124224877602640002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1600660003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10130681 + ... + 10130838.

It is an arithmetic number, because the mean of its divisors is an integer number (405230400).

Almost surely, 2^1600660001 is an apocalyptic number.

It is an amenable number.

1600660001 is a deficient number, since it is larger than the sum of its proper divisors (20261599).

1600660001 is an equidigital number, since it uses as much as digits as its factorization.

1600660001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20261598.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1600660001 is about 40008.2491618916. The cubic root of 1600660001 is about 1169.7678943965.

The spelling of 1600660001 in words is "one billion, six hundred million, six hundred sixty thousand, one".