66554055 has 84 divisors (see below), whose sum is σ = 130241880. Its totient is φ = 32542560.

The previous prime is 66554053. The next prime is 66554057. The reversal of 66554055 is 55045566.

It is a happy number.

66554055 is a `hidden beast` number, since 6 + 65 + 540 + 55 = 666.

It is an interprime number because it is at equal distance from previous prime (66554053) and next prime (66554057).

It is not a de Polignac number, because 66554055 - 2¹ = 66554053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66554053) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 2146890 + ... + 2146920.

Almost surely, 2^66554055 is an apocalyptic number.

66554055 is a deficient number, since it is larger than the sum of its proper divisors (63687825).

66554055 is an equidigital number, since it uses as much as digits as its factorization.

66554055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The square root of 66554055 is about 8158.0668666051. The cubic root of 66554055 is about 405.2516953983.

The spelling of 66554055 in words is "sixty-six million, five hundred fifty-four thousand, fifty-five".