66679104556 has 24 divisors (see below), whose sum is σ = 124242718320. Its totient is φ = 31203098112.

The previous prime is 66679104551. The next prime is 66679104577. The reversal of 66679104556 is 65540197666.

It is a super-2 number, since 2×66679104556² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66679104497 and 66679104506.

It is not an unprimeable number, because it can be changed into a prime (66679104551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2726865 + ... + 2751208.

It is an arithmetic number, because the mean of its divisors is an integer number (5176779930).

Almost surely, 2^66679104556 is an apocalyptic number.

It is an amenable number.

66679104556 is a deficient number, since it is larger than the sum of its proper divisors (57563613764).

66679104556 is a wasteful number, since it uses less digits than its factorization.

66679104556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5478273 (or 5478271 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 55.

The spelling of 66679104556 in words is "sixty-six billion, six hundred seventy-nine million, one hundred four thousand, five hundred fifty-six".