66365208 has 144 divisors (see below), whose sum is σ = 225323280. Its totient is φ = 17490816.

The previous prime is 66365207. The next prime is 66365213. The reversal of 66365208 is 80256366.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66365207) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 45141 + ... + 46587.

It is an arithmetic number, because the mean of its divisors is an integer number (1564745).

Almost surely, 2^66365208 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 66365208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112661640).

66365208 is an abundant number, since it is smaller than the sum of its proper divisors (158958072).

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

66365208 is a wasteful number, since it uses less digits than its factorization.

66365208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486 (or 1472 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 66365208 is about 8146.4843951241. The cubic root of 66365208 is about 404.8680319919.

The spelling of 66365208 in words is "sixty-six million, three hundred sixty-five thousand, two hundred eight".