66785055 has 8 divisors (see below), whose sum is σ = 106856112. Its totient is φ = 35618688.

The previous prime is 66785041. The next prime is 66785071. The reversal of 66785055 is 55058766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66785055 - 2²⁰ = 65736479 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66784998 and 66785016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2226154 + ... + 2226183.

It is an arithmetic number, because the mean of its divisors is an integer number (13357014).

Almost surely, 2^66785055 is an apocalyptic number.

66785055 is a deficient number, since it is larger than the sum of its proper divisors (40071057).

66785055 is a wasteful number, since it uses less digits than its factorization.

66785055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4452345.

The product of its (nonzero) digits is 252000, while the sum is 42.

The square root of 66785055 is about 8172.2123687530. The cubic root of 66785055 is about 405.7200116858.

The spelling of 66785055 in words is "sixty-six million, seven hundred eighty-five thousand, fifty-five".