66246645 has 8 divisors (see below), whose sum is σ = 105994656. Its totient is φ = 35331536.

The previous prime is 66246619. The next prime is 66246667. The reversal of 66246645 is 54664266.

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

It is a cyclic number.

It is not a de Polignac number, because 66246645 - 2⁷ = 66246517 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2208207 + ... + 2208236.

It is an arithmetic number, because the mean of its divisors is an integer number (13249332).

Almost surely, 2^66246645 is an apocalyptic number.

It is an amenable number.

66246645 is a deficient number, since it is larger than the sum of its proper divisors (39748011).

66246645 is a wasteful number, since it uses less digits than its factorization.

66246645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4416451.

The product of its digits is 207360, while the sum is 39.

The square root of 66246645 is about 8139.2041994288. The cubic root of 66246645 is about 404.6267861940.

The spelling of 66246645 in words is "sixty-six million, two hundred forty-six thousand, six hundred forty-five".