66665358 has 12 divisors (see below), whose sum is σ = 144441648.
Its totient is φ = 22221780.
The previous prime is 66665341. The next prime is 66665359. The reversal of 66665358 is 85356666.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (66665359) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1851798 + ... + 1851833.
It is an arithmetic number, because the mean of its divisors is an integer number (12036804).
Almost surely, 266665358 is an apocalyptic number.
66665358 is an abundant number, since it is smaller than the sum of its proper divisors (77776290).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
66665358 is a wasteful number, since it uses less digits than its factorization.
66665358 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3703639 (or 3703636 counting only the distinct ones).
The product of its digits is 777600, while the sum is 45.
The square root of 66665358 is about 8164.8856697446.
The cubic root of 66665358 is about 405.4774798292.
The spelling of 66665358 in words is "sixty-six million, six hundred sixty-five thousand, three hundred fifty-eight".