66552593 has 16 divisors (see below), whose sum is σ = 72558720. Its totient is φ = 60850944.

The previous prime is 66552583. The next prime is 66552601. The reversal of 66552593 is 39525566.

It is a cyclic number.

It is not a de Polignac number, because 66552593 - 2⁸ = 66552337 is a prime.

It is a super-3 number, since 3×66552593³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66552593.

It is not an unprimeable number, because it can be changed into a prime (66552583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74930 + ... + 75812.

It is an arithmetic number, because the mean of its divisors is an integer number (4534920).

Almost surely, 2^66552593 is an apocalyptic number.

It is an amenable number.

66552593 is a deficient number, since it is larger than the sum of its proper divisors (6006127).

66552593 is a wasteful number, since it uses less digits than its factorization.

66552593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048.

The product of its digits is 243000, while the sum is 41.

The square root of 66552593 is about 8157.9772615520. The cubic root of 66552593 is about 405.2487279742.

The spelling of 66552593 in words is "sixty-six million, five hundred fifty-two thousand, five hundred ninety-three".