64066420 has 48 divisors (see below), whose sum is σ = 147990528. Its totient is φ = 23103360.

The previous prime is 64066417. The next prime is 64066433. The reversal of 64066420 is 2466046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26794 + ... + 29086.

It is an arithmetic number, because the mean of its divisors is an integer number (3083136).

Almost surely, 2^64066420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64066420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73995264).

64066420 is an abundant number, since it is smaller than the sum of its proper divisors (83924108).

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

64066420 is a wasteful number, since it uses less digits than its factorization.

64066420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2440 (or 2438 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 64066420 is about 8004.1501735037. The cubic root of 64066420 is about 400.1383271585.

The spelling of 64066420 in words is "sixty-four million, sixty-six thousand, four hundred twenty".