66423270 has 32 divisors (see below), whose sum is σ = 159644160. Its totient is φ = 17687520.

The previous prime is 66423263. The next prime is 66423271. The reversal of 66423270 is 7232466.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66423271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30105 + ... + 32235.

It is an arithmetic number, because the mean of its divisors is an integer number (4988880).

Almost surely, 2^66423270 is an apocalyptic number.

66423270 is an abundant number, since it is smaller than the sum of its proper divisors (93220890).

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

66423270 is a wasteful number, since it uses less digits than its factorization.

66423270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3180.

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 66423270 is about 8150.0472391269. The cubic root of 66423270 is about 404.9860687176.

The spelling of 66423270 in words is "sixty-six million, four hundred twenty-three thousand, two hundred seventy".