66955592 has 36 divisors (see below), whose sum is σ = 138518835. Its totient is φ = 30318640.

The previous prime is 66955591. The next prime is 66955631. The reversal of 66955592 is 29555966.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 33477796 + 33477796 = 5786^2 + 5786^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=5786.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66955591) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 254453 + ... + 254715.

Almost surely, 2^66955592 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66955592

66955592 is an abundant number, since it is smaller than the sum of its proper divisors (71563243).

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

66955592 is a wasteful number, since it uses less digits than its factorization.

66955592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 276 counting only the distinct ones).

The product of its digits is 729000, while the sum is 47.

The square root of 66955592 is about 8182.6396718907. The cubic root of 66955592 is about 406.0650562676.

The spelling of 66955592 in words is "sixty-six million, nine hundred fifty-five thousand, five hundred ninety-two".