660402201 has 4 divisors (see below), whose sum is σ = 880536272. Its totient is φ = 440268132.

The previous prime is 660402191. The next prime is 660402203. The reversal of 660402201 is 102204066.

It is a happy number.

660402201 is digitally balanced in base 2, 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 660402201 - 2⁹ = 660401689 is a prime.

It is a super-2 number, since 2×660402201² = 872262134171288802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660402203) 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, 110067031 + ... + 110067036.

It is an arithmetic number, because the mean of its divisors is an integer number (220134068).

Almost surely, 2^660402201 is an apocalyptic number.

It is an amenable number.

660402201 is a deficient number, since it is larger than the sum of its proper divisors (220134071).

660402201 is a wasteful number, since it uses less digits than its factorization.

660402201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220134070.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 660402201 is about 25698.2917914791. The cubic root of 660402201 is about 870.8355917027.

Adding to 660402201 its reverse (102204066), we get a palindrome (762606267).

The spelling of 660402201 in words is "six hundred sixty million, four hundred two thousand, two hundred one".