66748284 has 18 divisors (see below), whose sum is σ = 168724920. Its totient is φ = 22249416.

The previous prime is 66748271. The next prime is 66748289. The reversal of 66748284 is 48284766.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66748289) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 927024 + ... + 927095.

Almost surely, 2^66748284 is an apocalyptic number.

It is an amenable number.

66748284 is an abundant number, since it is smaller than the sum of its proper divisors (101976636).

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

66748284 is a wasteful number, since it uses less digits than its factorization.

66748284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854129 (or 1854124 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The square root of 66748284 is about 8169.9623010146. The cubic root of 66748284 is about 405.6455365935.

The spelling of 66748284 in words is "sixty-six million, seven hundred forty-eight thousand, two hundred eighty-four".