66868432 has 40 divisors (see below), whose sum is σ = 134857440. Its totient is φ = 32081280.

The previous prime is 66868427. The next prime is 66868433. The reversal of 66868432 is 23486866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66868433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97563 + ... + 98245.

It is an arithmetic number, because the mean of its divisors is an integer number (3371436).

Almost surely, 2^66868432 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 66868432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67428720).

66868432 is an abundant number, since it is smaller than the sum of its proper divisors (67989008).

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

66868432 is a wasteful number, since it uses less digits than its factorization.

66868432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931 (or 925 counting only the distinct ones).

The product of its digits is 331776, while the sum is 43.

The square root of 66868432 is about 8177.3120277998. The cubic root of 66868432 is about 405.8887802319. Note that the first 3 decimals are identical.

The spelling of 66868432 in words is "sixty-six million, eight hundred sixty-eight thousand, four hundred thirty-two".