66825353 has 4 divisors (see below), whose sum is σ = 76371840. Its totient is φ = 57278868.

The previous prime is 66825329. The next prime is 66825379. The reversal of 66825353 is 35352866.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66825353 - 2¹² = 66821257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66825953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4773233 + ... + 4773246.

It is an arithmetic number, because the mean of its divisors is an integer number (19092960).

Almost surely, 2^66825353 is an apocalyptic number.

It is an amenable number.

66825353 is a deficient number, since it is larger than the sum of its proper divisors (9546487).

66825353 is an equidigital number, since it uses as much as digits as its factorization.

66825353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9546486.

The product of its digits is 129600, while the sum is 38.

The square root of 66825353 is about 8174.6775471574. The cubic root of 66825353 is about 405.8015988896.

The spelling of 66825353 in words is "sixty-six million, eight hundred twenty-five thousand, three hundred fifty-three".