66618540614 has 16 divisors (see below), whose sum is σ = 103660845120. Its totient is φ = 32085493440.

The previous prime is 66618540587. The next prime is 66618540623. The reversal of 66618540614 is 41604581666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5135429 + ... + 5148384.

It is an arithmetic number, because the mean of its divisors is an integer number (6478802820).

Almost surely, 2^66618540614 is an apocalyptic number.

66618540614 is a deficient number, since it is larger than the sum of its proper divisors (37042304506).

66618540614 is a wasteful number, since it uses less digits than its factorization.

66618540614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10283935.

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 66618540614 in words is "sixty-six billion, six hundred eighteen million, five hundred forty thousand, six hundred fourteen".