66994708 has 12 divisors (see below), whose sum is σ = 127899072. Its totient is φ = 30452120.

The previous prime is 66994691. The next prime is 66994709. The reversal of 66994708 is 80749966.

66994708 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 (66994709) 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, 761260 + ... + 761347.

It is an arithmetic number, because the mean of its divisors is an integer number (10658256).

Almost surely, 2^66994708 is an apocalyptic number.

It is an amenable number.

66994708 is a deficient number, since it is larger than the sum of its proper divisors (60904364).

66994708 is a wasteful number, since it uses less digits than its factorization.

66994708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1522622 (or 1522620 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The square root of 66994708 is about 8185.0295051392. The cubic root of 66994708 is about 406.1441163737.

The spelling of 66994708 in words is "sixty-six million, nine hundred ninety-four thousand, seven hundred eight".