1201065660 has 72 divisors (see below), whose sum is σ = 3661834176. Its totient is φ = 318648960.

The previous prime is 1201065647. The next prime is 1201065673. The reversal of 1201065660 is 665601021.

It is a happy number.

1201065660 is a `hidden beast` number, since 1 + 2 + 0 + 1 + 0 + 656 + 6 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1201065647) and next prime (1201065673).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18525 + ... + 52395.

It is an arithmetic number, because the mean of its divisors is an integer number (50858808).

Almost surely, 2^1201065660 is an apocalyptic number.

1201065660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1201065660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1830917088).

1201065660 is an abundant number, since it is smaller than the sum of its proper divisors (2460768516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1201065660 is a wasteful number, since it uses less digits than its factorization.

1201065660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34083 (or 34078 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1201065660 is about 34656.3942152094. The cubic root of 1201065660 is about 1062.9730407596.

Adding to 1201065660 its reverse (665601021), we get a palindrome (1866666681).

The spelling of 1201065660 in words is "one billion, two hundred one million, sixty-five thousand, six hundred sixty".