66242856 has 32 divisors (see below), whose sum is σ = 166148640. Its totient is φ = 22008768.

The previous prime is 66242851. The next prime is 66242861. The reversal of 66242856 is 65824266.

66242856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (66242851) and next prime (66242861).

It is not an unprimeable number, because it can be changed into a prime (66242851) 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, 3255 + ... + 11961.

It is an arithmetic number, because the mean of its divisors is an integer number (5192145).

Almost surely, 2^66242856 is an apocalyptic number.

It is an amenable number.

66242856 is an abundant number, since it is smaller than the sum of its proper divisors (99905784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66242856 is a wasteful number, since it uses less digits than its factorization.

66242856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9033 (or 9029 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 66242856 is about 8138.9714337869. The cubic root of 66242856 is about 404.6190717901.

The spelling of 66242856 in words is "sixty-six million, two hundred forty-two thousand, eight hundred fifty-six".