66543802814 has 64 divisors (see below), whose sum is σ = 113948550144. Its totient is φ = 28971081216.

The previous prime is 66543802757. The next prime is 66543802823. The reversal of 66543802814 is 41820834566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3453872 + ... + 3473084.

It is an arithmetic number, because the mean of its divisors is an integer number (1780446096).

Almost surely, 2^66543802814 is an apocalyptic number.

66543802814 is a deficient number, since it is larger than the sum of its proper divisors (47404747330).

66543802814 is a wasteful number, since it uses less digits than its factorization.

66543802814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19401.

The product of its (nonzero) digits is 1105920, while the sum is 47.

The spelling of 66543802814 in words is "sixty-six billion, five hundred forty-three million, eight hundred two thousand, eight hundred fourteen".