66145470 has 64 divisors (see below), whose sum is σ = 175426560. Its totient is φ = 15876608.

The previous prime is 66145427. The next prime is 66145489. The reversal of 66145470 is 7454166.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8911 + ... + 14549.

It is an arithmetic number, because the mean of its divisors is an integer number (2741040).

Almost surely, 2^66145470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66145470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87713280).

66145470 is an abundant number, since it is smaller than the sum of its proper divisors (109281090).

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

66145470 is a wasteful number, since it uses less digits than its factorization.

66145470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5689.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 66145470 is about 8132.9865363223. The cubic root of 66145470 is about 404.4206928707.

The spelling of 66145470 in words is "sixty-six million, one hundred forty-five thousand, four hundred seventy".