66748430 has 64 divisors (see below), whose sum is σ = 143700480. Its totient is φ = 21840000.

The previous prime is 66748399. The next prime is 66748433. The reversal of 66748430 is 3484766.

It is a happy number.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66748433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 265805 + ... + 266055.

It is an arithmetic number, because the mean of its divisors is an integer number (2245320).

Almost surely, 2^66748430 is an apocalyptic number.

66748430 is an abundant number, since it is smaller than the sum of its proper divisors (76952050).

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

66748430 is a wasteful number, since it uses less digits than its factorization.

66748430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 66748430 is about 8169.9712361795. The cubic root of 66748430 is about 405.6458323524.

The spelling of 66748430 in words is "sixty-six million, seven hundred forty-eight thousand, four hundred thirty".