66549336722 has 16 divisors (see below), whose sum is σ = 115304733792. Its totient is φ = 28470304320.

The previous prime is 66549336719. The next prime is 66549336767. The reversal of 66549336722 is 22763394566.

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, 88969328 + ... + 88970075.

It is an arithmetic number, because the mean of its divisors is an integer number (7206545862).

Almost surely, 2^66549336722 is an apocalyptic number.

66549336722 is a deficient number, since it is larger than the sum of its proper divisors (48755397070).

66549336722 is a wasteful number, since it uses less digits than its factorization.

66549336722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177939433.

The product of its digits is 9797760, while the sum is 53.

The spelling of 66549336722 in words is "sixty-six billion, five hundred forty-nine million, three hundred thirty-six thousand, seven hundred twenty-two".