2661650208 has 108 divisors (see below), whose sum is σ = 8804880630. Its totient is φ = 760467456.

The previous prime is 2661650141. The next prime is 2661650213. The reversal of 2661650208 is 8020561662.

It can be written as a sum of positive squares in only one way, i.e., 2080454544 + 581195664 = 45612^2 + 24108^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 80193 + ... + 108416.

Almost surely, 2^2661650208 is an apocalyptic number.

2661650208 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2661650208 is an abundant number, since it is smaller than the sum of its proper divisors (6143230422).

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

2661650208 is a wasteful number, since it uses less digits than its factorization.

2661650208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188639 (or 188621 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 2661650208 is about 51591.1834328308. The cubic root of 2661650208 is about 1385.8524483267.

The spelling of 2661650208 in words is "two billion, six hundred sixty-one million, six hundred fifty thousand, two hundred eight".