1660135011 has 4 divisors (see below), whose sum is σ = 2213513352. Its totient is φ = 1106756672.

The previous prime is 1660134991. The next prime is 1660135027. The reversal of 1660135011 is 1105310661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1660135011 - 2³⁰ = 586393187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1660125011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 276689166 + ... + 276689171.

It is an arithmetic number, because the mean of its divisors is an integer number (553378338).

Almost surely, 2^1660135011 is an apocalyptic number.

1660135011 is a deficient number, since it is larger than the sum of its proper divisors (553378341).

1660135011 is an equidigital number, since it uses as much as digits as its factorization.

1660135011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553378340.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 1660135011 is about 40744.7543985726. The cubic root of 1660135011 is about 1184.0802469788.

Adding to 1660135011 its reverse (1105310661), we get a palindrome (2765445672).

The spelling of 1660135011 in words is "one billion, six hundred sixty million, one hundred thirty-five thousand, eleven".