5554664561 has 2 divisors, whose sum is σ = 5554664562. Its totient is φ = 5554664560.

The previous prime is 5554664503. The next prime is 5554664567. The reversal of 5554664561 is 1654664555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5326080400 + 228584161 = 72980^2 + 15119^2 .

It is a cyclic number.

It is not a de Polignac number, because 5554664561 - 2²² = 5550470257 is a prime.

It is a super-3 number, since 3×5554664561³ (a number of 30 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (5554664567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777332280 + 2777332281.

It is an arithmetic number, because the mean of its divisors is an integer number (2777332281).

Almost surely, 2^5554664561 is an apocalyptic number.

It is an amenable number.

5554664561 is a deficient number, since it is larger than the sum of its proper divisors (1).

5554664561 is an equidigital number, since it uses as much as digits as its factorization.

5554664561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160000, while the sum is 47.

The square root of 5554664561 is about 74529.6220371471. The cubic root of 5554664561 is about 1771.0029279423.

The spelling of 5554664561 in words is "five billion, five hundred fifty-four million, six hundred sixty-four thousand, five hundred sixty-one".