55665277 has 2 divisors, whose sum is σ = 55665278. Its totient is φ = 55665276.

The previous prime is 55665223. The next prime is 55665287. The reversal of 55665277 is 77256655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36252441 + 19412836 = 6021^2 + 4406^2 .

It is a cyclic number.

It is not a de Polignac number, because 55665277 - 2¹¹ = 55663229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55665287) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27832638 + 27832639.

It is an arithmetic number, because the mean of its divisors is an integer number (27832639).

Almost surely, 2^55665277 is an apocalyptic number.

It is an amenable number.

55665277 is a deficient number, since it is larger than the sum of its proper divisors (1).

55665277 is an equidigital number, since it uses as much as digits as its factorization.

55665277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 441000, while the sum is 43.

The square root of 55665277 is about 7460.9166326933. The cubic root of 55665277 is about 381.8224483942.

The spelling of 55665277 in words is "fifty-five million, six hundred sixty-five thousand, two hundred seventy-seven".