66896442 has 48 divisors (see below), whose sum is σ = 152923680. Its totient is φ = 21911472.

The previous prime is 66896429. The next prime is 66896471. The reversal of 66896442 is 24469866.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27508 + ... + 29840.

It is an arithmetic number, because the mean of its divisors is an integer number (3185910).

Almost surely, 2^66896442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66896442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76461840).

66896442 is an abundant number, since it is smaller than the sum of its proper divisors (86027238).

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

66896442 is a wasteful number, since it uses less digits than its factorization.

66896442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2409 (or 2397 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 66896442 is about 8179.0245139625. The cubic root of 66896442 is about 405.9454455240.

It can be divided in two parts, 6689 and 6442, that added together give a palindrome (13131).

The spelling of 66896442 in words is "sixty-six million, eight hundred ninety-six thousand, four hundred forty-two".