66278883388 has 6 divisors (see below), whose sum is σ = 115988045936. Its totient is φ = 33139441692.

The previous prime is 66278883323. The next prime is 66278883403. The reversal of 66278883388 is 88338887266.

66278883388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8284860420 + ... + 8284860427.

Almost surely, 2^66278883388 is an apocalyptic number.

It is an amenable number.

66278883388 is a deficient number, since it is larger than the sum of its proper divisors (49709162548).

66278883388 is a wasteful number, since it uses less digits than its factorization.

66278883388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16569720851 (or 16569720849 counting only the distinct ones).

The product of its digits is 148635648, while the sum is 67.

The spelling of 66278883388 in words is "sixty-six billion, two hundred seventy-eight million, eight hundred eighty-three thousand, three hundred eighty-eight".