66987012 has 12 divisors (see below), whose sum is σ = 156303056. Its totient is φ = 22329000.

The previous prime is 66986999. The next prime is 66987031. The reversal of 66987012 is 21078966.

It is a tau number, because it is divible by the number of its divisors (12).

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, 2791114 + ... + 2791137.

Almost surely, 2^66987012 is an apocalyptic number.

It is an amenable number.

66987012 is an abundant number, since it is smaller than the sum of its proper divisors (89316044).

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

66987012 is a wasteful number, since it uses less digits than its factorization.

66987012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5582258 (or 5582256 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 66987012 is about 8184.5593650483. The cubic root of 66987012 is about 406.1285638775.

The spelling of 66987012 in words is "sixty-six million, nine hundred eighty-seven thousand, twelve".