66691482 has 64 divisors (see below), whose sum is σ = 164989440. Its totient is φ = 17668800.

The previous prime is 66691481. The next prime is 66691511. The reversal of 66691482 is 28419666.

It is not an unprimeable number, because it can be changed into a prime (66691481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14257 + ... + 18347.

It is an arithmetic number, because the mean of its divisors is an integer number (2577960).

Almost surely, 2^66691482 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66691482, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82494720).

66691482 is an abundant number, since it is smaller than the sum of its proper divisors (98297958).

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

66691482 is a wasteful number, since it uses less digits than its factorization.

66691482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4139.

The product of its digits is 124416, while the sum is 42.

The square root of 66691482 is about 8166.4852905029. The cubic root of 66691482 is about 405.5304374204.

The spelling of 66691482 in words is "sixty-six million, six hundred ninety-one thousand, four hundred eighty-two".