2606554721 has 2 divisors, whose sum is σ = 2606554722. Its totient is φ = 2606554720.

The previous prime is 2606554711. The next prime is 2606554723. The reversal of 2606554721 is 1274556062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2281113121 + 325441600 = 47761^2 + 18040^2 .

It is a cyclic number.

It is not a de Polignac number, because 2606554721 - 2²² = 2602360417 is a prime.

Together with 2606554723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2606554723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1303277360 + 1303277361.

It is an arithmetic number, because the mean of its divisors is an integer number (1303277361).

Almost surely, 2^2606554721 is an apocalyptic number.

It is an amenable number.

2606554721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2606554721 is an equidigital number, since it uses as much as digits as its factorization.

2606554721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 2606554721 is about 51054.4290047396. The cubic root of 2606554721 is about 1376.2234349131.

The spelling of 2606554721 in words is "two billion, six hundred six million, five hundred fifty-four thousand, seven hundred twenty-one".