66687852 has 48 divisors (see below), whose sum is σ = 194003712. Its totient is φ = 17321280.

The previous prime is 66687839. The next prime is 66687871. The reversal of 66687852 is 25878666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35163 + ... + 37010.

It is an arithmetic number, because the mean of its divisors is an integer number (4041744).

Almost surely, 2^66687852 is an apocalyptic number.

It is an amenable number.

66687852 is an abundant number, since it is smaller than the sum of its proper divisors (127315860).

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

66687852 is a wasteful number, since it uses less digits than its factorization.

66687852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72198 (or 72196 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 66687852 is about 8166.2630376446. The cubic root of 66687852 is about 405.5230796482.

The spelling of 66687852 in words is "sixty-six million, six hundred eighty-seven thousand, eight hundred fifty-two".