55066890761 has 2 divisors, whose sum is σ = 55066890762. Its totient is φ = 55066890760.

The previous prime is 55066890727. The next prime is 55066890779. The reversal of 55066890761 is 16709866055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48927228025 + 6139662736 = 221195^2 + 78356^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55066890761 is a prime.

It is not a weakly prime, because it can be changed into another prime (55066895761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27533445380 + 27533445381.

It is an arithmetic number, because the mean of its divisors is an integer number (27533445381).

Almost surely, 2^55066890761 is an apocalyptic number.

It is an amenable number.

55066890761 is a deficient number, since it is larger than the sum of its proper divisors (1).

55066890761 is an equidigital number, since it uses as much as digits as its factorization.

55066890761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2721600, while the sum is 53.

The spelling of 55066890761 in words is "fifty-five billion, sixty-six million, eight hundred ninety thousand, seven hundred sixty-one".