66442606 has 8 divisors (see below), whose sum is σ = 99744984. Its totient is φ = 33194280.

The previous prime is 66442589. The next prime is 66442619. The reversal of 66442606 is 60624466.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10285 + ... + 15448.

It is an arithmetic number, because the mean of its divisors is an integer number (12468123).

Almost surely, 2^66442606 is an apocalyptic number.

66442606 is a deficient number, since it is larger than the sum of its proper divisors (33302378).

66442606 is a wasteful number, since it uses less digits than its factorization.

66442606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27026.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 66442606 is about 8151.2334036022. The cubic root of 66442606 is about 405.0253624314.

The spelling of 66442606 in words is "sixty-six million, four hundred forty-two thousand, six hundred six".