66912736 has 24 divisors (see below), whose sum is σ = 143711064. Its totient is φ = 30414720.

The previous prime is 66912733. The next prime is 66912751. The reversal of 66912736 is 63721966.

66912736 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 (66912733) 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, 94695 + ... + 95398.

It is an arithmetic number, because the mean of its divisors is an integer number (5987961).

Almost surely, 2^66912736 is an apocalyptic number.

It is an amenable number.

66912736 is an abundant number, since it is smaller than the sum of its proper divisors (76798328).

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

66912736 is a wasteful number, since it uses less digits than its factorization.

66912736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190114 (or 190106 counting only the distinct ones).

The product of its digits is 81648, while the sum is 40.

The square root of 66912736 is about 8180.0205378715. The cubic root of 66912736 is about 405.9784016271.

The spelling of 66912736 in words is "sixty-six million, nine hundred twelve thousand, seven hundred thirty-six".