66018010920 has 32 divisors (see below), whose sum is σ = 198054033120. Its totient is φ = 17604802880.

The previous prime is 66018010901. The next prime is 66018010931. The reversal of 66018010920 is 2901081066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275074926 + ... + 275075165.

It is an arithmetic number, because the mean of its divisors is an integer number (6189188535).

Almost surely, 2^66018010920 is an apocalyptic number.

66018010920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66018010920 is an abundant number, since it is smaller than the sum of its proper divisors (132036022200).

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

66018010920 is a wasteful number, since it uses less digits than its factorization.

66018010920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550150105 (or 550150101 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

Adding to 66018010920 its reverse (2901081066), we get a palindrome (68919091986).

The spelling of 66018010920 in words is "sixty-six billion, eighteen million, ten thousand, nine hundred twenty".