66602194 has 8 divisors (see below), whose sum is σ = 100075248. Its totient is φ = 33243780.

The previous prime is 66602147. The next prime is 66602197. The reversal of 66602194 is 49120666.

66602194 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66602194² = 8871704491227272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66602197) 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 3 ways as a sum of consecutive naturals, for example, 27192 + ... + 29539.

It is an arithmetic number, because the mean of its divisors is an integer number (12509406).

Almost surely, 2^66602194 is an apocalyptic number.

66602194 is a deficient number, since it is larger than the sum of its proper divisors (33473054).

66602194 is a wasteful number, since it uses less digits than its factorization.

66602194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57320.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 66602194 is about 8161.0167258743. The cubic root of 66602194 is about 405.3493789516.

The spelling of 66602194 in words is "sixty-six million, six hundred two thousand, one hundred ninety-four".