1201660620 has 24 divisors (see below), whose sum is σ = 3364649904. Its totient is φ = 320442816.

The previous prime is 1201660597. The next prime is 1201660627. The reversal of 1201660620 is 260661021.

It is not an unprimeable number, because it can be changed into a prime (1201660627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10013779 + ... + 10013898.

It is an arithmetic number, because the mean of its divisors is an integer number (140193746).

Almost surely, 2^1201660620 is an apocalyptic number.

1201660620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1201660620 is an abundant number, since it is smaller than the sum of its proper divisors (2162989284).

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

1201660620 is a wasteful number, since it uses less digits than its factorization.

1201660620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20027689 (or 20027687 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1201660620 is about 34664.9768498408. The cubic root of 1201660620 is about 1063.1485299283.

The spelling of 1201660620 in words is "one billion, two hundred one million, six hundred sixty thousand, six hundred twenty".