66888966 has 8 divisors (see below), whose sum is σ = 133777944. Its totient is φ = 22296320.

The previous prime is 66888961. The next prime is 66888977. The reversal of 66888966 is 66988866.

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

66888966 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66888961) 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, 5574075 + ... + 5574086.

It is an arithmetic number, because the mean of its divisors is an integer number (16722243).

Almost surely, 2^66888966 is an apocalyptic number.

66888966 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.

66888966 is a wasteful number, since it uses less digits than its factorization.

66888966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11148166.

The product of its digits is 5971968, while the sum is 57.

The square root of 66888966 is about 8178.5674784769. The cubic root of 66888966 is about 405.9303228402.

The spelling of 66888966 in words is "sixty-six million, eight hundred eighty-eight thousand, nine hundred sixty-six".