66354822 has 48 divisors (see below), whose sum is σ = 150421680. Its totient is φ = 21681792.

The previous prime is 66354817. The next prime is 66354823. The reversal of 66354822 is 22845366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66354823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 187798 + ... + 188150.

It is an arithmetic number, because the mean of its divisors is an integer number (3133785).

Almost surely, 2^66354822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66354822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75210840).

66354822 is an abundant number, since it is smaller than the sum of its proper divisors (84066858).

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

66354822 is a wasteful number, since it uses less digits than its factorization.

66354822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482 (or 417 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 66354822 is about 8145.8469172947. The cubic root of 66354822 is about 404.8469105896.

It can be divided in two parts, 66354 and 822, that added together give a palindrome (67176).

The spelling of 66354822 in words is "sixty-six million, three hundred fifty-four thousand, eight hundred twenty-two".