66258432 has 80 divisors (see below), whose sum is σ = 196170480. Its totient is φ = 22081536.

The previous prime is 66258373. The next prime is 66258449. The reversal of 66258432 is 23485266.

It is a super-2 number, since 2×66258432² = 8780359622197248, which contains 22 as substring.

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

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11428 + ... + 16220.

It is an arithmetic number, because the mean of its divisors is an integer number (2452131).

Almost surely, 2^66258432 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 66258432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98085240).

66258432 is an abundant number, since it is smaller than the sum of its proper divisors (129912048).

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

66258432 is an equidigital number, since it uses as much as digits as its factorization.

66258432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4820 (or 4798 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 66258432 is about 8139.9282552121. The cubic root of 66258432 is about 404.6507826449.

The spelling of 66258432 in words is "sixty-six million, two hundred fifty-eight thousand, four hundred thirty-two".