66352194 has 48 divisors (see below), whose sum is σ = 150800832. Its totient is φ = 21045024.

The previous prime is 66352193. The next prime is 66352219. The reversal of 66352194 is 49125366.

It is a happy number.

66352194 is a `hidden beast` number, since 6 + 635 + 2 + 19 + 4 = 666.

66352194 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66352194² = 8805227297227272, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66352193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121029 + ... + 121575.

It is an arithmetic number, because the mean of its divisors is an integer number (3141684).

Almost surely, 2^66352194 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66352194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75400416).

66352194 is an abundant number, since it is smaller than the sum of its proper divisors (84448638).

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

66352194 is a wasteful number, since it uses less digits than its factorization.

66352194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871 (or 868 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 66352194 is about 8145.6856065036. The cubic root of 66352194 is about 404.8415658300.

The spelling of 66352194 in words is "sixty-six million, three hundred fifty-two thousand, one hundred ninety-four".