66807232 has 56 divisors (see below), whose sum is σ = 138371072. Its totient is φ = 31968000.

The previous prime is 66807199. The next prime is 66807239. The reversal of 66807232 is 23270866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66807239) 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, 299473 + ... + 299695.

It is an arithmetic number, because the mean of its divisors is an integer number (2470912).

Almost surely, 2^66807232 is an apocalyptic number.

66807232 is a gapful number since it is divisible by the number (62) 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 66807232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69185536).

66807232 is an abundant number, since it is smaller than the sum of its proper divisors (71563840).

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

66807232 is a wasteful number, since it uses less digits than its factorization.

66807232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 66807232 is about 8173.5691102480. The cubic root of 66807232 is about 405.7649152297.

The spelling of 66807232 in words is "sixty-six million, eight hundred seven thousand, two hundred thirty-two".