55500077 has 2 divisors, whose sum is σ = 55500078. Its totient is φ = 55500076.

The previous prime is 55500047. The next prime is 55500079. The reversal of 55500077 is 77000555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35688676 + 19811401 = 5974^2 + 4451^2 .

It is a cyclic number.

It is not a de Polignac number, because 55500077 - 2¹² = 55495981 is a prime.

Together with 55500079, it forms a pair of twin primes.

It is a Chen prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55500079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27750038 + 27750039.

It is an arithmetic number, because the mean of its divisors is an integer number (27750039).

Almost surely, 2^55500077 is an apocalyptic number.

It is an amenable number.

55500077 is a deficient number, since it is larger than the sum of its proper divisors (1).

55500077 is an equidigital number, since it uses as much as digits as its factorization.

55500077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6125, while the sum is 29.

The square root of 55500077 is about 7449.8373807755. The cubic root of 55500077 is about 381.4443576962. Note that the first 3 decimals are identical.

The spelling of 55500077 in words is "fifty-five million, five hundred thousand, seventy-seven".