2666365650 has 72 divisors (see below), whose sum is σ = 7714701540. Its totient is φ = 656334720.

The previous prime is 2666365649. The next prime is 2666365657. The reversal of 2666365650 is 565636662.

It can be written as a sum of positive squares in 6 ways, for example, as 1153077849 + 1513287801 = 33957^2 + 38901^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 2666365596 and 2666365605.

It is not an unprimeable number, because it can be changed into a prime (2666365657) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 222045 + ... + 233744.

Almost surely, 2^2666365650 is an apocalyptic number.

2666365650 is an abundant number, since it is smaller than the sum of its proper divisors (5048335890).

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

2666365650 is a wasteful number, since it uses less digits than its factorization.

2666365650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455820 (or 455812 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 45.

The square root of 2666365650 is about 51636.8632858349. The cubic root of 2666365650 is about 1386.6703684129.

The spelling of 2666365650 in words is "two billion, six hundred sixty-six million, three hundred sixty-five thousand, six hundred fifty".