66078988 has 12 divisors (see below), whose sum is σ = 115797472. Its totient is φ = 32994000.

The previous prime is 66078953. The next prime is 66079007. The reversal of 66078988 is 88987066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7995 + ... + 14002.

Almost surely, 2^66078988 is an apocalyptic number.

It is an amenable number.

66078988 is a deficient number, since it is larger than the sum of its proper divisors (49718484).

66078988 is a wasteful number, since it uses less digits than its factorization.

66078988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22752 (or 22750 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 52.

The square root of 66078988 is about 8128.8983263416. The cubic root of 66078988 is about 404.2851546932.

The spelling of 66078988 in words is "sixty-six million, seventy-eight thousand, nine hundred eighty-eight".