66094856816 has 20 divisors (see below), whose sum is σ = 128355918624. Its totient is φ = 32970748800.

The previous prime is 66094856783. The next prime is 66094856819. The reversal of 66094856816 is 61865849066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66094856819) 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, 4785365 + ... + 4799156.

Almost surely, 2^66094856816 is an apocalyptic number.

It is an amenable number.

66094856816 is a deficient number, since it is larger than the sum of its proper divisors (62261061808).

66094856816 is a wasteful number, since it uses less digits than its factorization.

66094856816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9584960 (or 9584954 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 59.

The spelling of 66094856816 in words is "sixty-six billion, ninety-four million, eight hundred fifty-six thousand, eight hundred sixteen".