66545622 has 96 divisors (see below), whose sum is σ = 171714816. Its totient is φ = 18360000.

The previous prime is 66545621. The next prime is 66545629. The reversal of 66545622 is 22654566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66545621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 264997 + ... + 265247.

It is an arithmetic number, because the mean of its divisors is an integer number (1788696).

Almost surely, 2^66545622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66545622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85857408).

66545622 is an abundant number, since it is smaller than the sum of its proper divisors (105169194).

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

66545622 is a wasteful number, since it uses less digits than its factorization.

66545622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386 (or 383 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 66545622 is about 8157.5499998468. The cubic root of 66545622 is about 405.2345783250.

The spelling of 66545622 in words is "sixty-six million, five hundred forty-five thousand, six hundred twenty-two".