2661266000 has 40 divisors (see below), whose sum is σ = 6434946024. Its totient is φ = 1064505600.

The previous prime is 2661265973. The next prime is 2661266009. The reversal of 2661266000 is 6621662.

It can be written as a sum of positive squares in 4 ways, for example, as 13957696 + 2647308304 = 3736^2 + 51452^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661266009) 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 7 ways as a sum of consecutive naturals, for example, 663317 + ... + 667316.

Almost surely, 2^2661266000 is an apocalyptic number.

2661266000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2661266000 is an abundant number, since it is smaller than the sum of its proper divisors (3773680024).

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

2661266000 is a wasteful number, since it uses less digits than its factorization.

2661266000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330656 (or 1330640 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 2661266000 is about 51587.4597164854. The cubic root of 2661266000 is about 1385.7857627272.

Adding to 2661266000 its reverse (6621662), we get a palindrome (2667887662).

The spelling of 2661266000 in words is "two billion, six hundred sixty-one million, two hundred sixty-six thousand".