2001706650 has 144 divisors (see below), whose sum is σ = 5802880824. Its totient is φ = 492810240.

The previous prime is 2001706579. The next prime is 2001706687. The reversal of 2001706650 is 566071002.

2001706650 is a `hidden beast` number, since 2 + 0 + 0 + 1 + 7 + 0 + 6 + 650 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 427124889 + 1574581761 = 20667^2 + 39681^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 402982 + ... + 407918.

Almost surely, 2^2001706650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001706650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2901440412).

2001706650 is an abundant number, since it is smaller than the sum of its proper divisors (3801174174).

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

2001706650 is a wasteful number, since it uses less digits than its factorization.

2001706650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5025 (or 5017 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 2001706650 is about 44740.4364082426. The cubic root of 2001706650 is about 1260.2793220500.

Adding to 2001706650 its reverse (566071002), we get a palindrome (2567777652).

The spelling of 2001706650 in words is "two billion, one million, seven hundred six thousand, six hundred fifty".