66553359 has 4 divisors (see below), whose sum is σ = 88737816. Its totient is φ = 44368904.

The previous prime is 66553337. The next prime is 66553369. The reversal of 66553359 is 95335566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66553359 - 2⁵ = 66553327 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66553359.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66553369) 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, 11092224 + ... + 11092229.

It is an arithmetic number, because the mean of its divisors is an integer number (22184454).

Almost surely, 2^66553359 is an apocalyptic number.

66553359 is a deficient number, since it is larger than the sum of its proper divisors (22184457).

66553359 is a wasteful number, since it uses less digits than its factorization.

66553359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22184456.

The product of its digits is 364500, while the sum is 42.

The square root of 66553359 is about 8158.0242093291. The cubic root of 66553359 is about 405.2502827312.

The spelling of 66553359 in words is "sixty-six million, five hundred fifty-three thousand, three hundred fifty-nine".