66844822628 has 24 divisors (see below), whose sum is σ = 122123973888. Its totient is φ = 31953675776.

The previous prime is 66844822619. The next prime is 66844822661. The reversal of 66844822628 is 82622844866.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13700 + ... + 365892.

It is an arithmetic number, because the mean of its divisors is an integer number (5088498912).

Almost surely, 2^66844822628 is an apocalyptic number.

It is an amenable number.

66844822628 is a deficient number, since it is larger than the sum of its proper divisors (55279151260).

66844822628 is a wasteful number, since it uses less digits than its factorization.

66844822628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354283 (or 354281 counting only the distinct ones).

The product of its digits is 14155776, while the sum is 56.

The spelling of 66844822628 in words is "sixty-six billion, eight hundred forty-four million, eight hundred twenty-two thousand, six hundred twenty-eight".