66789708 has 12 divisors (see below), whose sum is σ = 155842680. Its totient is φ = 22263232.

The previous prime is 66789703. The next prime is 66789713. The reversal of 66789708 is 80798766.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66789703) and next prime (66789713).

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

It is not an unprimeable number, because it can be changed into a prime (66789703) 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, 2782893 + ... + 2782916.

It is an arithmetic number, because the mean of its divisors is an integer number (12986890).

Almost surely, 2^66789708 is an apocalyptic number.

It is an amenable number.

66789708 is an abundant number, since it is smaller than the sum of its proper divisors (89052972).

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

66789708 is a wasteful number, since it uses less digits than its factorization.

66789708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5565816 (or 5565814 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 51.

The square root of 66789708 is about 8172.4970480264. The cubic root of 66789708 is about 405.7294338106.

The spelling of 66789708 in words is "sixty-six million, seven hundred eighty-nine thousand, seven hundred eight".