66118578306 has 64 divisors (see below), whose sum is σ = 153195425280. Its totient is φ = 18813392640.

The previous prime is 66118578293. The next prime is 66118578307. The reversal of 66118578306 is 60387581166.

66118578306 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66118578307) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91600 + ... + 375003.

It is an arithmetic number, because the mean of its divisors is an integer number (2393678520).

Almost surely, 2^66118578306 is an apocalyptic number.

66118578306 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

66118578306 is an abundant number, since it is smaller than the sum of its proper divisors (87076846974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66118578306 is a wasteful number, since it uses less digits than its factorization.

66118578306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466751.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 66118578306 in words is "sixty-six billion, one hundred eighteen million, five hundred seventy-eight thousand, three hundred six".