660206101 has 16 divisors (see below), whose sum is σ = 725442048. Its totient is φ = 598118400.

The previous prime is 660206089. The next prime is 660206117. The reversal of 660206101 is 101602066.

It is a cyclic number.

It is not a de Polignac number, because 660206101 - 2¹⁵ = 660173333 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 (660206171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98466 + ... + 104956.

It is an arithmetic number, because the mean of its divisors is an integer number (45340128).

Almost surely, 2^660206101 is an apocalyptic number.

It is an amenable number.

660206101 is a deficient number, since it is larger than the sum of its proper divisors (65235947).

660206101 is a wasteful number, since it uses less digits than its factorization.

660206101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6732.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 660206101 is about 25694.4760795000. The cubic root of 660206101 is about 870.7493877879.

Adding to 660206101 its reverse (101602066), we get a palindrome (761808167).

The spelling of 660206101 in words is "six hundred sixty million, two hundred six thousand, one hundred one".