66720088 has 16 divisors (see below), whose sum is σ = 125191080. Its totient is φ = 33335808.

The previous prime is 66720061. The next prime is 66720089. The reversal of 66720088 is 88002766.

66720088 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66720089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14931 + ... + 18877.

Almost surely, 2^66720088 is an apocalyptic number.

It is an amenable number.

66720088 is a deficient number, since it is larger than the sum of its proper divisors (58470992).

66720088 is a wasteful number, since it uses less digits than its factorization.

66720088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6066 (or 6062 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 66720088 is about 8168.2365293863. The cubic root of 66720088 is about 405.5884105685.

The spelling of 66720088 in words is "sixty-six million, seven hundred twenty thousand, eighty-eight".