66579868 has 12 divisors (see below), whose sum is σ = 116596480. Its totient is φ = 33266592.

The previous prime is 66579839. The next prime is 66579889. The reversal of 66579868 is 86897566.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1648 + ... + 11656.

Almost surely, 2^66579868 is an apocalyptic number.

It is an amenable number.

66579868 is a deficient number, since it is larger than the sum of its proper divisors (50016612).

66579868 is a wasteful number, since it uses less digits than its factorization.

66579868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11676 (or 11674 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 55.

The square root of 66579868 is about 8159.6487669507. The cubic root of 66579868 is about 405.3040809361.

The spelling of 66579868 in words is "sixty-six million, five hundred seventy-nine thousand, eight hundred sixty-eight".