160665969985 has 4 divisors (see below), whose sum is σ = 192799163988. Its totient is φ = 128532775984.

The previous prime is 160665969983. The next prime is 160665970007. The reversal of 160665969985 is 589969566061.

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

It can be written as a sum of positive squares in 2 ways, for example, as 60227049744 + 100438920241 = 245412^2 + 316921^2 .

It is a cyclic number.

It is not a de Polignac number, because 160665969985 - 2¹ = 160665969983 is a prime.

It is a super-2 number, since 2×160665969985² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (160665969983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16066596994 + ... + 16066597003.

It is an arithmetic number, because the mean of its divisors is an integer number (48199790997).

Almost surely, 2^160665969985 is an apocalyptic number.

It is an amenable number.

160665969985 is a deficient number, since it is larger than the sum of its proper divisors (32133194003).

160665969985 is an equidigital number, since it uses as much as digits as its factorization.

160665969985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32133194002.

The product of its (nonzero) digits is 188956800, while the sum is 70.

The spelling of 160665969985 in words is "one hundred sixty billion, six hundred sixty-five million, nine hundred sixty-nine thousand, nine hundred eighty-five".