66622776376 has 16 divisors (see below), whose sum is σ = 134526760200. Its totient is φ = 30748973664.

The previous prime is 66622776361. The next prime is 66622776377. The reversal of 66622776376 is 67367722666.

It is a self number, because there is not a number n which added to its sum of digits gives 66622776376.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66622776377) 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, 320301706 + ... + 320301913.

Almost surely, 2^66622776376 is an apocalyptic number.

It is an amenable number.

66622776376 is an abundant number, since it is smaller than the sum of its proper divisors (67903983824).

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

66622776376 is a wasteful number, since it uses less digits than its factorization.

66622776376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640603638 (or 640603634 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 58.

The spelling of 66622776376 in words is "sixty-six billion, six hundred twenty-two million, seven hundred seventy-six thousand, three hundred seventy-six".