49066561 has 2 divisors, whose sum is σ = 49066562. Its totient is φ = 49066560.

The previous prime is 49066559. The next prime is 49066571. The reversal of 49066561 is 16566094.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48385936 + 680625 = 6956^2 + 825^2 .

It is a cyclic number.

It is not a de Polignac number, because 49066561 - 2¹ = 49066559 is a prime.

Together with 49066559, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 49066561.

It is not a weakly prime, because it can be changed into another prime (49066571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24533280 + 24533281.

It is an arithmetic number, because the mean of its divisors is an integer number (24533281).

Almost surely, 2^49066561 is an apocalyptic number.

It is an amenable number.

49066561 is a deficient number, since it is larger than the sum of its proper divisors (1).

49066561 is an equidigital number, since it uses as much as digits as its factorization.

49066561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 49066561 is about 7004.7527436734. The cubic root of 49066561 is about 366.0961879032.

The spelling of 49066561 in words is "forty-nine million, sixty-six thousand, five hundred sixty-one".