5566121554451 has 2 divisors, whose sum is σ = 5566121554452. Its totient is φ = 5566121554450.

The previous prime is 5566121554387. The next prime is 5566121554481. The reversal of 5566121554451 is 1544551216655.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5566121554451 - 2⁶ = 5566121554387 is a prime.

It is a super-2 number, since 2×5566121554451² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 5566121554451.

It is not a weakly prime, because it can be changed into another prime (5566121554481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2783060777225 + 2783060777226.

It is an arithmetic number, because the mean of its divisors is an integer number (2783060777226).

Almost surely, 2^{5566121554451} is an apocalyptic number.

5566121554451 is a deficient number, since it is larger than the sum of its proper divisors (1).

5566121554451 is an equidigital number, since it uses as much as digits as its factorization.

5566121554451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600000, while the sum is 50.

The spelling of 5566121554451 in words is "five trillion, five hundred sixty-six billion, one hundred twenty-one million, five hundred fifty-four thousand, four hundred fifty-one".