1659980211 has 4 divisors (see below), whose sum is σ = 2213306952. Its totient is φ = 1106653472.

The previous prime is 1659980209. The next prime is 1659980221. The reversal of 1659980211 is 1120899561.

1659980211 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 1659980211 - 2¹ = 1659980209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1659980221) 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, 276663366 + ... + 276663371.

It is an arithmetic number, because the mean of its divisors is an integer number (553326738).

Almost surely, 2^1659980211 is an apocalyptic number.

1659980211 is a deficient number, since it is larger than the sum of its proper divisors (553326741).

1659980211 is an equidigital number, since it uses as much as digits as its factorization.

1659980211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553326740.

The product of its (nonzero) digits is 38880, while the sum is 42.

The square root of 1659980211 is about 40742.8547232518. The cubic root of 1659980211 is about 1184.0434424783.

The spelling of 1659980211 in words is "one billion, six hundred fifty-nine million, nine hundred eighty thousand, two hundred eleven".