2675521661 has 2 divisors, whose sum is σ = 2675521662. Its totient is φ = 2675521660.

The previous prime is 2675521571. The next prime is 2675521663. The reversal of 2675521661 is 1661255762.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2244959161 + 430562500 = 47381^2 + 20750^2 .

It is a cyclic number.

It is not a de Polignac number, because 2675521661 - 2¹⁴ = 2675505277 is a prime.

Together with 2675521663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2675521663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1337760830 + 1337760831.

It is an arithmetic number, because the mean of its divisors is an integer number (1337760831).

Almost surely, 2^2675521661 is an apocalyptic number.

It is an amenable number.

2675521661 is a deficient number, since it is larger than the sum of its proper divisors (1).

2675521661 is an equidigital number, since it uses as much as digits as its factorization.

2675521661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 41.

The square root of 2675521661 is about 51725.4450053356. The cubic root of 2675521661 is about 1388.2557803956.

The spelling of 2675521661 in words is "two billion, six hundred seventy-five million, five hundred twenty-one thousand, six hundred sixty-one".