66552897 has 8 divisors (see below), whose sum is σ = 88781056. Its totient is φ = 44346672.

The previous prime is 66552887. The next prime is 66552907. The reversal of 66552897 is 79825566.

It is a happy number.

66552897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66552887) and next prime (66552907).

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

It is not a de Polignac number, because 66552897 - 2¹⁰ = 66551873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66552887) 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 7 ways as a sum of consecutive naturals, for example, 3888 + ... + 12174.

It is an arithmetic number, because the mean of its divisors is an integer number (11097632).

Almost surely, 2^66552897 is an apocalyptic number.

It is an amenable number.

66552897 is a deficient number, since it is larger than the sum of its proper divisors (22228159).

66552897 is a wasteful number, since it uses less digits than its factorization.

66552897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10967.

The product of its digits is 907200, while the sum is 48.

The square root of 66552897 is about 8157.9958936003. The cubic root of 66552897 is about 405.2493450071.

The spelling of 66552897 in words is "sixty-six million, five hundred fifty-two thousand, eight hundred ninety-seven".