66614243658 has 8 divisors (see below), whose sum is σ = 133228487328. Its totient is φ = 22204747884.

The previous prime is 66614243627. The next prime is 66614243659. The reversal of 66614243658 is 85634241666.

It is a sphenic number, since it is the product of 3 distinct primes.

66614243658 is an admirable number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66614243658.

It is not an unprimeable number, because it can be changed into a prime (66614243659) 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, 5551186966 + ... + 5551186977.

It is an arithmetic number, because the mean of its divisors is an integer number (16653560916).

Almost surely, 2^66614243658 is an apocalyptic number.

66614243658 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

66614243658 is a wasteful number, since it uses less digits than its factorization.

66614243658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11102373948.

The product of its digits is 4976640, while the sum is 51.

The spelling of 66614243658 in words is "sixty-six billion, six hundred fourteen million, two hundred forty-three thousand, six hundred fifty-eight".