66823521932 has 12 divisors (see below), whose sum is σ = 116965564800. Its totient is φ = 33404789136.

The previous prime is 66823521931. The next prime is 66823521943. The reversal of 66823521932 is 23912532866.

It is not an unprimeable number, because it can be changed into a prime (66823521931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1721363 + ... + 1759754.

It is an arithmetic number, because the mean of its divisors is an integer number (9747130400).

Almost surely, 2^66823521932 is an apocalyptic number.

It is an amenable number.

66823521932 is a deficient number, since it is larger than the sum of its proper divisors (50142042868).

66823521932 is a wasteful number, since it uses less digits than its factorization.

66823521932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3485920 (or 3485918 counting only the distinct ones).

The product of its digits is 933120, while the sum is 47.

The spelling of 66823521932 in words is "sixty-six billion, eight hundred twenty-three million, five hundred twenty-one thousand, nine hundred thirty-two".