66078708 has 12 divisors (see below), whose sum is σ = 154183680. Its totient is φ = 22026232.

The previous prime is 66078703. The next prime is 66078709. The reversal of 66078708 is 80787066.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 66078708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66078703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2753268 + ... + 2753291.

It is an arithmetic number, because the mean of its divisors is an integer number (12848640).

Almost surely, 2^66078708 is an apocalyptic number.

It is an amenable number.

66078708 is an abundant number, since it is smaller than the sum of its proper divisors (88104972).

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

66078708 is a wasteful number, since it uses less digits than its factorization.

66078708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5506566 (or 5506564 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 66078708 is about 8128.8811038174. The cubic root of 66078708 is about 404.2845836594.

The spelling of 66078708 in words is "sixty-six million, seventy-eight thousand, seven hundred eight".