66748470 has 64 divisors (see below), whose sum is σ = 166890240. Its totient is φ = 17071488.

The previous prime is 66748453. The next prime is 66748483. The reversal of 66748470 is 7484766.

66748470 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 75672 + ... + 76548.

It is an arithmetic number, because the mean of its divisors is an integer number (2607660).

Almost surely, 2^66748470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66748470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83445120).

66748470 is an abundant number, since it is smaller than the sum of its proper divisors (100141770).

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

66748470 is a wasteful number, since it uses less digits than its factorization.

66748470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989.

The product of its (nonzero) digits is 225792, while the sum is 42.

The square root of 66748470 is about 8169.9736841681. The cubic root of 66748470 is about 405.6459133822.

It can be divided in two parts, 6 and 6748470, that added together give a palindrome (6748476).

The spelling of 66748470 in words is "sixty-six million, seven hundred forty-eight thousand, four hundred seventy".