66108708 has 36 divisors (see below), whose sum is σ = 167533548. Its totient is φ = 21980160.

The previous prime is 66108703. The next prime is 66108737. The reversal of 66108708 is 80780166.

It can be written as a sum of positive squares in 2 ways, for example, as 40220964 + 25887744 = 6342^2 + 5088^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×66108708² = 8740722546858528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (66108703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13468 + ... + 17708.

Almost surely, 2^66108708 is an apocalyptic number.

It is an amenable number.

66108708 is an abundant number, since it is smaller than the sum of its proper divisors (101424840).

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

66108708 is a wasteful number, since it uses less digits than its factorization.

66108708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4684 (or 4679 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 66108708 is about 8130.7261668316. The cubic root of 66108708 is about 404.3457566801.

The spelling of 66108708 in words is "sixty-six million, one hundred eight thousand, seven hundred eight".