2001195660 has 24 divisors (see below), whose sum is σ = 5603348016. Its totient is φ = 533652160.

The previous prime is 2001195659. The next prime is 2001195683. The reversal of 2001195660 is 665911002.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 16676571 + ... + 16676690.

It is an arithmetic number, because the mean of its divisors is an integer number (233472834).

Almost surely, 2^2001195660 is an apocalyptic number.

2001195660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001195660 is an abundant number, since it is smaller than the sum of its proper divisors (3602152356).

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

2001195660 is a wasteful number, since it uses less digits than its factorization.

2001195660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33353273 (or 33353271 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 2001195660 is about 44734.7254378520. The cubic root of 2001195660 is about 1260.1720727456.

The spelling of 2001195660 in words is "two billion, one million, one hundred ninety-five thousand, six hundred sixty".