66678696854414 has 8 divisors (see below), whose sum is σ = 100018080486480. Its totient is φ = 33339336692256.

The previous prime is 66678696854389. The next prime is 66678696854443. The reversal of 66678696854414 is 41445869687666.

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

It is a super-2 number, since 2×66678696854414² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6193622 + ... + 13104134.

It is an arithmetic number, because the mean of its divisors is an integer number (12502260060810).

Almost surely, 2^{66678696854414} is an apocalyptic number.

66678696854414 is a deficient number, since it is larger than the sum of its proper divisors (33339383632066).

66678696854414 is a wasteful number, since it uses less digits than its factorization.

66678696854414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11734954.

The product of its digits is 10032906240, while the sum is 80.

The spelling of 66678696854414 in words is "sixty-six trillion, six hundred seventy-eight billion, six hundred ninety-six million, eight hundred fifty-four thousand, four hundred fourteen".