66708966 has 8 divisors (see below), whose sum is σ = 133417944. Its totient is φ = 22236320.

The previous prime is 66708949. The next prime is 66708977. The reversal of 66708966 is 66980766.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

66708966 is an admirable number.

It is a super-2 number, since 2×66708966² = 8900172289578312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5559075 + ... + 5559086.

It is an arithmetic number, because the mean of its divisors is an integer number (16677243).

Almost surely, 2^66708966 is an apocalyptic number.

66708966 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66708966 is a wasteful number, since it uses less digits than its factorization.

66708966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11118166.

The product of its (nonzero) digits is 653184, while the sum is 48.

The square root of 66708966 is about 8167.5556931067. Note that the first 3 decimals coincide. The cubic root of 66708966 is about 405.5658726037.

The spelling of 66708966 in words is "sixty-six million, seven hundred eight thousand, nine hundred sixty-six".