2661751033 has 2 divisors, whose sum is σ = 2661751034. Its totient is φ = 2661751032.

The previous prime is 2661751019. The next prime is 2661751063. The reversal of 2661751033 is 3301571662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1917388944 + 744362089 = 43788^2 + 27283^2 .

It is a cyclic number.

It is not a de Polignac number, because 2661751033 - 2⁹ = 2661750521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2661751033.

It is not a weakly prime, because it can be changed into another prime (2661751003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330875516 + 1330875517.

It is an arithmetic number, because the mean of its divisors is an integer number (1330875517).

Almost surely, 2^2661751033 is an apocalyptic number.

It is an amenable number.

2661751033 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661751033 is an equidigital number, since it uses as much as digits as its factorization.

2661751033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 2661751033 is about 51592.1605769714. The cubic root of 2661751033 is about 1385.8699470960.

The spelling of 2661751033 in words is "two billion, six hundred sixty-one million, seven hundred fifty-one thousand, thirty-three".