55756777 has 2 divisors, whose sum is σ = 55756778. Its totient is φ = 55756776.

The previous prime is 55756769. The next prime is 55756781. The reversal of 55756777 is 77765755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45414121 + 10342656 = 6739^2 + 3216^2 .

It is a cyclic number.

It is not a de Polignac number, because 55756777 - 2³ = 55756769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55756777.

It is not a weakly prime, because it can be changed into another prime (55756177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27878388 + 27878389.

It is an arithmetic number, because the mean of its divisors is an integer number (27878389).

Almost surely, 2^55756777 is an apocalyptic number.

It is an amenable number.

55756777 is a deficient number, since it is larger than the sum of its proper divisors (1).

55756777 is an equidigital number, since it uses as much as digits as its factorization.

55756777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800750, while the sum is 49.

The square root of 55756777 is about 7467.0460692298. The cubic root of 55756777 is about 382.0315412129.

The spelling of 55756777 in words is "fifty-five million, seven hundred fifty-six thousand, seven hundred seventy-seven".