66266641 has 8 divisors (see below), whose sum is σ = 76584960. Its totient is φ = 56161248.

The previous prime is 66266639. The next prime is 66266647. The reversal of 66266641 is 14666266.

66266641 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 cyclic number.

It is not a de Polignac number, because 66266641 - 2¹ = 66266639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66266641.

It is not an unprimeable number, because it can be changed into a prime (66266647) 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 7 ways as a sum of consecutive naturals, for example, 52561 + ... + 53806.

It is an arithmetic number, because the mean of its divisors is an integer number (9573120).

Almost surely, 2^66266641 is an apocalyptic number.

It is an amenable number.

66266641 is a deficient number, since it is larger than the sum of its proper divisors (10318319).

66266641 is a wasteful number, since it uses less digits than its factorization.

66266641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106463.

The product of its digits is 62208, while the sum is 37.

The square root of 66266641 is about 8140.4324823685. The cubic root of 66266641 is about 404.6674931777.

The spelling of 66266641 in words is "sixty-six million, two hundred sixty-six thousand, six hundred forty-one".