2661331016 has 8 divisors (see below), whose sum is σ = 4989995670. Its totient is φ = 1330665504.

The previous prime is 2661331003. The next prime is 2661331019. The reversal of 2661331016 is 6101331662.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1929844900 + 731486116 = 43930^2 + 27046^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 2661331016.

It is not an unprimeable number, because it can be changed into a prime (2661331019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166333181 + ... + 166333196.

Almost surely, 2^2661331016 is an apocalyptic number.

It is an amenable number.

2661331016 is a deficient number, since it is larger than the sum of its proper divisors (2328664654).

2661331016 is a wasteful number, since it uses less digits than its factorization.

2661331016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332666383 (or 332666379 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 2661331016 is about 51588.0898657820. The cubic root of 2661331016 is about 1385.7970477714.

Adding to 2661331016 its reverse (6101331662), we get a palindrome (8762662678).

The spelling of 2661331016 in words is "two billion, six hundred sixty-one million, three hundred thirty-one thousand, sixteen".