66023424 has 130 divisors (see below), whose sum is σ = 198222200. Its totient is φ = 21897216.

The previous prime is 66023413. The next prime is 66023431. The reversal of 66023424 is 42432066.

66023424 is a `hidden beast` number, since 6 + 602 + 34 + 24 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 331677 + ... + 331875.

Almost surely, 2^66023424 is an apocalyptic number.

66023424 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66023424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99111100).

66023424 is an abundant number, since it is smaller than the sum of its proper divisors (132198776).

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

66023424 is an equidigital number, since it uses as much as digits as its factorization.

66023424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 66023424 is about 8125.4799242875. The cubic root of 66023424 is about 404.1718055014.

The spelling of 66023424 in words is "sixty-six million, twenty-three thousand, four hundred twenty-four".