66785018 has 8 divisors (see below), whose sum is σ = 100731540. Its totient is φ = 33207840.

The previous prime is 66785011. The next prime is 66785041. The reversal of 66785018 is 81058766.

It can be written as a sum of positive squares in 2 ways, for example, as 39400729 + 27384289 = 6277^2 + 5233^2 .

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

It is not an unprimeable number, because it can be changed into a prime (66785011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91883 + ... + 92606.

Almost surely, 2^66785018 is an apocalyptic number.

66785018 is a deficient number, since it is larger than the sum of its proper divisors (33946522).

66785018 is a wasteful number, since it uses less digits than its factorization.

66785018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184672.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 66785018 is about 8172.2101049838. The cubic root of 66785018 is about 405.7199367606.

The spelling of 66785018 in words is "sixty-six million, seven hundred eighty-five thousand, eighteen".