66641641224 has 64 divisors (see below), whose sum is σ = 167555485440. Its totient is φ = 22087287360.

The previous prime is 66641641211. The next prime is 66641641259. The reversal of 66641641224 is 42214614666.

It is a super-2 number, since 2×66641641224² (a number of 22 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4410787 + ... + 4425869.

It is an arithmetic number, because the mean of its divisors is an integer number (2618054460).

Almost surely, 2^66641641224 is an apocalyptic number.

It is an amenable number.

66641641224 is an abundant number, since it is smaller than the sum of its proper divisors (100913844216).

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

66641641224 is a wasteful number, since it uses less digits than its factorization.

66641641224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16130 (or 16126 counting only the distinct ones).

The product of its digits is 331776, while the sum is 42.

The spelling of 66641641224 in words is "sixty-six billion, six hundred forty-one million, six hundred forty-one thousand, two hundred twenty-four".