66533884 has 12 divisors (see below), whose sum is σ = 117523224. Its totient is φ = 32955824.

The previous prime is 66533861. The next prime is 66533893. The reversal of 66533884 is 48833566.

It is a self number, because there is not a number n which added to its sum of digits gives 66533884.

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, 77299 + ... + 78154.

It is an arithmetic number, because the mean of its divisors is an integer number (9793602).

Almost surely, 2^66533884 is an apocalyptic number.

It is an amenable number.

66533884 is a deficient number, since it is larger than the sum of its proper divisors (50989340).

66533884 is a wasteful number, since it uses less digits than its factorization.

66533884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155564 (or 155562 counting only the distinct ones).

The product of its digits is 414720, while the sum is 43.

The square root of 66533884 is about 8156.8305119084. The cubic root of 66533884 is about 405.2107504456.

The spelling of 66533884 in words is "sixty-six million, five hundred thirty-three thousand, eight hundred eighty-four".