66067988 has 24 divisors (see below), whose sum is σ = 132324864. Its totient is φ = 28274400.

The previous prime is 66067979. The next prime is 66067999. The reversal of 66067988 is 88976066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26558 + ... + 28938.

It is an arithmetic number, because the mean of its divisors is an integer number (5513536).

Almost surely, 2^66067988 is an apocalyptic number.

It is an amenable number.

66067988 is an abundant number, since it is smaller than the sum of its proper divisors (66256876).

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

66067988 is a wasteful number, since it uses less digits than its factorization.

66067988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3383 (or 3381 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 66067988 is about 8128.2216997324. The cubic root of 66067988 is about 404.2627200100.

The spelling of 66067988 in words is "sixty-six million, sixty-seven thousand, nine hundred eighty-eight".