66886888 has 16 divisors (see below), whose sum is σ = 125499780. Its totient is φ = 33420288.

The previous prime is 66886849. The next prime is 66886903. The reversal of 66886888 is 88868866.

It can be written as a sum of positive squares in 2 ways, for example, as 54199044 + 12687844 = 7362^2 + 3562^2 .

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, 20506 + ... + 23542.

Almost surely, 2^66886888 is an apocalyptic number.

It is an amenable number.

66886888 is a deficient number, since it is larger than the sum of its proper divisors (58612892).

66886888 is a wasteful number, since it uses less digits than its factorization.

66886888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5796 (or 5792 counting only the distinct ones).

The product of its digits is 7077888, while the sum is 58.

The square root of 66886888 is about 8178.4404381276. The cubic root of 66886888 is about 405.9261191975.

The spelling of 66886888 in words is "sixty-six million, eight hundred eighty-six thousand, eight hundred eighty-eight".