66058240 has 48 divisors (see below), whose sum is σ = 158525640. Its totient is φ = 26419200.

The previous prime is 66058219. The next prime is 66058247. The reversal of 66058240 is 4285066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66058247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7015 + ... + 13465.

Almost surely, 2^66058240 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 66058240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79262820).

66058240 is an abundant number, since it is smaller than the sum of its proper divisors (92467400).

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

66058240 is an equidigital number, since it uses as much as digits as its factorization.

66058240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6478 (or 6458 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 66058240 is about 8127.6220384563. The cubic root of 66058240 is about 404.2428367203.

The spelling of 66058240 in words is "sixty-six million, fifty-eight thousand, two hundred forty".