66821048 has 16 divisors (see below), whose sum is σ = 143188080. Its totient is φ = 28637568.

The previous prime is 66821023. The next prime is 66821063. The reversal of 66821048 is 84012866.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66820999 and 66821017.

It is a congruent number.

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, 596561 + ... + 596672.

It is an arithmetic number, because the mean of its divisors is an integer number (8949255).

Almost surely, 2^66821048 is an apocalyptic number.

It is an amenable number.

66821048 is an abundant number, since it is smaller than the sum of its proper divisors (76367032).

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

66821048 is a wasteful number, since it uses less digits than its factorization.

66821048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193246 (or 1193242 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 66821048 is about 8174.4142297782. The cubic root of 66821048 is about 405.7928845652.

The spelling of 66821048 in words is "sixty-six million, eight hundred twenty-one thousand, forty-eight".