66242468 has 6 divisors (see below), whose sum is σ = 115924326. Its totient is φ = 33121232.

The previous prime is 66242453. The next prime is 66242471. The reversal of 66242468 is 86424266.

It can be written as a sum of positive squares in only one way, i.e., 66064384 + 178084 = 8128^2 + 422^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8280305 + ... + 8280312.

It is an arithmetic number, because the mean of its divisors is an integer number (19320721).

Almost surely, 2^66242468 is an apocalyptic number.

It is an amenable number.

66242468 is a deficient number, since it is larger than the sum of its proper divisors (49681858).

66242468 is a wasteful number, since it uses less digits than its factorization.

66242468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16560621 (or 16560619 counting only the distinct ones).

The product of its digits is 110592, while the sum is 38.

The square root of 66242468 is about 8138.9475978163. The cubic root of 66242468 is about 404.6182818055.

The spelling of 66242468 in words is "sixty-six million, two hundred forty-two thousand, four hundred sixty-eight".