2661531041 has 4 divisors (see below), whose sum is σ = 2866264212. Its totient is φ = 2456797872.

The previous prime is 2661531029. The next prime is 2661531073. The reversal of 2661531041 is 1401351662.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 612067600 + 2049463441 = 24740^2 + 45271^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2661531041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2661530995 and 2661531013.

It is not an unprimeable number, because it can be changed into a prime (2661531541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102366566 + ... + 102366591.

It is an arithmetic number, because the mean of its divisors is an integer number (716566053).

Almost surely, 2^2661531041 is an apocalyptic number.

It is an amenable number.

2661531041 is a deficient number, since it is larger than the sum of its proper divisors (204733171).

2661531041 is a wasteful number, since it uses less digits than its factorization.

2661531041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204733170.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 2661531041 is about 51590.0285035781. The cubic root of 2661531041 is about 1385.8317656260.

The spelling of 2661531041 in words is "two billion, six hundred sixty-one million, five hundred thirty-one thousand, forty-one".