66178454018 has 16 divisors (see below), whose sum is σ = 100262373696. Its totient is φ = 32757740400.

The previous prime is 66178453967. The next prime is 66178454039. The reversal of 66178454018 is 81045487166.

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, 2512505 + ... + 2538707.

It is an arithmetic number, because the mean of its divisors is an integer number (6266398356).

Almost surely, 2^66178454018 is an apocalyptic number.

66178454018 is a deficient number, since it is larger than the sum of its proper divisors (34083919678).

66178454018 is a wasteful number, since it uses less digits than its factorization.

66178454018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38809.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 66178454018 in words is "sixty-six billion, one hundred seventy-eight million, four hundred fifty-four thousand, eighteen".