1660443201 has 24 divisors (see below), whose sum is σ = 2457449280. Its totient is φ = 1079953056.

The previous prime is 1660443199. The next prime is 1660443217. The reversal of 1660443201 is 1023440661.

1660443201 is a `hidden beast` number, since 16 + 6 + 0 + 443 + 201 = 666.

It is not a de Polignac number, because 1660443201 - 2¹ = 1660443199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1660443221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75660 + ... + 95106.

It is an arithmetic number, because the mean of its divisors is an integer number (102393720).

Almost surely, 2^1660443201 is an apocalyptic number.

It is an amenable number.

1660443201 is a deficient number, since it is larger than the sum of its proper divisors (797006079).

1660443201 is a wasteful number, since it uses less digits than its factorization.

1660443201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19685 (or 19682 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1660443201 is about 40748.5361822974. The cubic root of 1660443201 is about 1184.1535139339.

Adding to 1660443201 its reverse (1023440661), we get a palindrome (2683883862).

The spelling of 1660443201 in words is "one billion, six hundred sixty million, four hundred forty-three thousand, two hundred one".