2016664650 has 576 divisors, whose sum is σ = 7533017856. Its totient is φ = 376358400.

The previous prime is 2016664621. The next prime is 2016664651. The reversal of 2016664650 is 564666102.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2016664651) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 54504432 + ... + 54504468.

It is an arithmetic number, because the mean of its divisors is an integer number (13078156).

Almost surely, 2^2016664650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2016664650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3766508928).

2016664650 is an abundant number, since it is smaller than the sum of its proper divisors (5516353206).

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

2016664650 is a wasteful number, since it uses less digits than its factorization.

2016664650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 2016664650 is about 44907.2894973633. The cubic root of 2016664650 is about 1263.4107325977.

It can be divided in two parts, 2016 and 664650, that added together give a palindrome (666666).

The spelling of 2016664650 in words is "two billion, sixteen million, six hundred sixty-four thousand, six hundred fifty".