66668402288 has 10 divisors (see below), whose sum is σ = 129170029464. Its totient is φ = 33334201136.

The previous prime is 66668402279. The next prime is 66668402321. The reversal of 66668402288 is 88220486666.

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, 2083387556 + ... + 2083387587.

Almost surely, 2^66668402288 is an apocalyptic number.

It is an amenable number.

66668402288 is a deficient number, since it is larger than the sum of its proper divisors (62501627176).

66668402288 is a wasteful number, since it uses less digits than its factorization.

66668402288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4166775151 (or 4166775145 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 56.

The spelling of 66668402288 in words is "sixty-six billion, six hundred sixty-eight million, four hundred two thousand, two hundred eighty-eight".