66486428 has 12 divisors (see below), whose sum is σ = 119057400. Its totient is φ = 32470032.

The previous prime is 66486421. The next prime is 66486437. The reversal of 66486428 is 82468466.

66486428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66486421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193103 + ... + 193446.

It is an arithmetic number, because the mean of its divisors is an integer number (9921450).

Almost surely, 2^66486428 is an apocalyptic number.

It is an amenable number.

66486428 is a deficient number, since it is larger than the sum of its proper divisors (52570972).

66486428 is a wasteful number, since it uses less digits than its factorization.

66486428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386596 (or 386594 counting only the distinct ones).

The product of its digits is 442368, while the sum is 44.

The square root of 66486428 is about 8153.9210199756. The cubic root of 66486428 is about 405.1143872396.

The spelling of 66486428 in words is "sixty-six million, four hundred eighty-six thousand, four hundred twenty-eight".