66798055 has 16 divisors (see below), whose sum is σ = 81607680. Its totient is φ = 52479648.

The previous prime is 66798031. The next prime is 66798059. The reversal of 66798055 is 55089766.

It is a cyclic number.

It is not a de Polignac number, because 66798055 - 2⁵ = 66798023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66797996 and 66798014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66798059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103564 + ... + 104206.

It is an arithmetic number, because the mean of its divisors is an integer number (5100480).

Almost surely, 2^66798055 is an apocalyptic number.

66798055 is a deficient number, since it is larger than the sum of its proper divisors (14809625).

66798055 is a wasteful number, since it uses less digits than its factorization.

66798055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990.

The product of its (nonzero) digits is 453600, while the sum is 46.

The square root of 66798055 is about 8173.0077083042. The cubic root of 66798055 is about 405.7463350300.

The spelling of 66798055 in words is "sixty-six million, seven hundred ninety-eight thousand, fifty-five".