66242850 has 24 divisors (see below), whose sum is σ = 164282640. Its totient is φ = 17664720.

The previous prime is 66242849. The next prime is 66242851. The reversal of 66242850 is 5824266.

66242850 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 (66242849) and next prime (66242851).

It is a super-2 number, since 2×66242850² = 8776230352245000, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 220660 + ... + 220959.

It is an arithmetic number, because the mean of its divisors is an integer number (6845110).

Almost surely, 2^66242850 is an apocalyptic number.

66242850 is an abundant number, since it is smaller than the sum of its proper divisors (98039790).

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

66242850 is a wasteful number, since it uses less digits than its factorization.

66242850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441634 (or 441629 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 66242850 is about 8138.9710651900. The cubic root of 66242850 is about 404.6190595739.

The spelling of 66242850 in words is "sixty-six million, two hundred forty-two thousand, eight hundred fifty".