66245450 has 48 divisors (see below), whose sum is σ = 129039360. Its totient is φ = 25272000.

The previous prime is 66245449. The next prime is 66245453. The reversal of 66245450 is 5454266.

It is not an unprimeable number, because it can be changed into a prime (66245453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122180 + ... + 122720.

It is an arithmetic number, because the mean of its divisors is an integer number (2688320).

Almost surely, 2^66245450 is an apocalyptic number.

66245450 is a deficient number, since it is larger than the sum of its proper divisors (62793910).

66245450 is a wasteful number, since it uses less digits than its factorization.

66245450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 66245450 is about 8139.1307889725. The cubic root of 66245450 is about 404.6243532058.

The spelling of 66245450 in words is "sixty-six million, two hundred forty-five thousand, four hundred fifty".