66910712 has 32 divisors (see below), whose sum is σ = 137963520. Its totient is φ = 30169440.

The previous prime is 66910693. The next prime is 66910769. The reversal of 66910712 is 21701966.

It is a happy number.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8183 + ... + 14169.

It is an arithmetic number, because the mean of its divisors is an integer number (4311360).

Almost surely, 2^66910712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66910712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68981760).

66910712 is an abundant number, since it is smaller than the sum of its proper divisors (71052808).

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

66910712 is a wasteful number, since it uses less digits than its factorization.

66910712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6131 (or 6127 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 66910712 is about 8179.8968208652. The cubic root of 66910712 is about 405.9743081933.

The spelling of 66910712 in words is "sixty-six million, nine hundred ten thousand, seven hundred twelve".