1660312213 has 16 divisors (see below), whose sum is σ = 1931769216. Its totient is φ = 1397499840.

The previous prime is 1660312189. The next prime is 1660312223. The reversal of 1660312213 is 3122130661.

It is a cyclic number.

It is not a de Polignac number, because 1660312213 - 2¹³ = 1660304021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660312223) 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 15 ways as a sum of consecutive naturals, for example, 288795 + ... + 294487.

It is an arithmetic number, because the mean of its divisors is an integer number (120735576).

Almost surely, 2^1660312213 is an apocalyptic number.

It is an amenable number.

1660312213 is a deficient number, since it is larger than the sum of its proper divisors (271457003).

1660312213 is an equidigital number, since it uses as much as digits as its factorization.

1660312213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6444.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1660312213 is about 40746.9288781376. The cubic root of 1660312213 is about 1184.1223748623.

Adding to 1660312213 its reverse (3122130661), we get a palindrome (4782442874).

The spelling of 1660312213 in words is "one billion, six hundred sixty million, three hundred twelve thousand, two hundred thirteen".