66239064 has 96 divisors (see below), whose sum is σ = 188697600. Its totient is φ = 20963520.

The previous prime is 66239039. The next prime is 66239071. The reversal of 66239064 is 46093266.

It is a super-2 number, since 2×66239064² = 8775227199192192, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131437 + ... + 131939.

It is an arithmetic number, because the mean of its divisors is an integer number (1965600).

Almost surely, 2^66239064 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 66239064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94348800).

66239064 is an abundant number, since it is smaller than the sum of its proper divisors (122458536).

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

66239064 is a wasteful number, since it uses less digits than its factorization.

66239064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605 (or 598 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 66239064 is about 8138.7384771843. The cubic root of 66239064 is about 404.6113509837.

The spelling of 66239064 in words is "sixty-six million, two hundred thirty-nine thousand, sixty-four".