66828349 has 8 divisors (see below), whose sum is σ = 76440320. Its totient is φ = 57232656.

The previous prime is 66828341. The next prime is 66828353. The reversal of 66828349 is 94382866.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66828349 - 2³ = 66828341 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66828299 and 66828308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66828341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6607 + ... + 13315.

It is an arithmetic number, because the mean of its divisors is an integer number (9555040).

Almost surely, 2^66828349 is an apocalyptic number.

It is an amenable number.

66828349 is a deficient number, since it is larger than the sum of its proper divisors (9611971).

66828349 is a wasteful number, since it uses less digits than its factorization.

66828349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8139.

The product of its digits is 497664, while the sum is 46.

The square root of 66828349 is about 8174.8607939218. The cubic root of 66828349 is about 405.8076632716.

The spelling of 66828349 in words is "sixty-six million, eight hundred twenty-eight thousand, three hundred forty-nine".