66013606 has 8 divisors (see below), whose sum is σ = 99104544. Its totient is φ = 32978760.

The previous prime is 66013603. The next prime is 66013631. The reversal of 66013606 is 60631066.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66013603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10945 + ... + 15868.

It is an arithmetic number, because the mean of its divisors is an integer number (12388068).

Almost surely, 2^66013606 is an apocalyptic number.

66013606 is a deficient number, since it is larger than the sum of its proper divisors (33090938).

66013606 is a wasteful number, since it uses less digits than its factorization.

66013606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28046.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 66013606 is about 8124.8757528962. The cubic root of 66013606 is about 404.1517704126.

The spelling of 66013606 in words is "sixty-six million, thirteen thousand, six hundred six".