2661211747 has 2 divisors, whose sum is σ = 2661211748. Its totient is φ = 2661211746.

The previous prime is 2661211741. The next prime is 2661211753. The reversal of 2661211747 is 7471121662.

It is a balanced prime because it is at equal distance from previous prime (2661211741) and next prime (2661211753).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2661211747 is a prime.

It is not a weakly prime, because it can be changed into another prime (2661211741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330605873 + 1330605874.

It is an arithmetic number, because the mean of its divisors is an integer number (1330605874).

Almost surely, 2^2661211747 is an apocalyptic number.

2661211747 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661211747 is an equidigital number, since it uses as much as digits as its factorization.

2661211747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28224, while the sum is 37.

The square root of 2661211747 is about 51586.9338786480. The cubic root of 2661211747 is about 1385.7763457121.

The spelling of 2661211747 in words is "two billion, six hundred sixty-one million, two hundred eleven thousand, seven hundred forty-seven".