55061777 has 2 divisors, whose sum is σ = 55061778. Its totient is φ = 55061776.

The previous prime is 55061771. The next prime is 55061779. The reversal of 55061777 is 77716055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47831056 + 7230721 = 6916^2 + 2689^2 .

It is a cyclic number.

It is not a de Polignac number, because 55061777 - 2⁴ = 55061761 is a prime.

Together with 55061779, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55061777.

It is not a weakly prime, because it can be changed into another prime (55061771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27530888 + 27530889.

It is an arithmetic number, because the mean of its divisors is an integer number (27530889).

Almost surely, 2^55061777 is an apocalyptic number.

It is an amenable number.

55061777 is a deficient number, since it is larger than the sum of its proper divisors (1).

55061777 is an equidigital number, since it uses as much as digits as its factorization.

55061777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51450, while the sum is 38.

The square root of 55061777 is about 7420.3623226902. The cubic root of 55061777 is about 380.4375776446.

The spelling of 55061777 in words is "fifty-five million, sixty-one thousand, seven hundred seventy-seven".