1600660081 has 2 divisors, whose sum is σ = 1600660082. Its totient is φ = 1600660080.

The previous prime is 1600660051. The next prime is 1600660093. The reversal of 1600660081 is 1800660061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1588819600 + 11840481 = 39860^2 + 3441^2 .

It is an emirp because it is prime and its reverse (1800660061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1600660081 - 2⁹ = 1600659569 is a prime.

It is a super-2 number, since 2×1600660081² = 5124225389813853122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1600660031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800330040 + 800330041.

It is an arithmetic number, because the mean of its divisors is an integer number (800330041).

Almost surely, 2^1600660081 is an apocalyptic number.

It is an amenable number.

1600660081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1600660081 is an equidigital number, since it uses as much as digits as its factorization.

1600660081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1600660081 is about 40008.2501616854. The cubic root of 1600660081 is about 1169.7679138846.

The spelling of 1600660081 in words is "one billion, six hundred million, six hundred sixty thousand, eighty-one".