66716773214 has 24 divisors (see below), whose sum is σ = 123846186960. Its totient is φ = 26393447808.

The previous prime is 66716773183. The next prime is 66716773231. The reversal of 66716773214 is 41237761766.

66716773214 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×66716773214² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14096699 + ... + 14101430.

It is an arithmetic number, because the mean of its divisors is an integer number (5160257790).

Almost surely, 2^66716773214 is an apocalyptic number.

66716773214 is a deficient number, since it is larger than the sum of its proper divisors (57129413746).

66716773214 is a wasteful number, since it uses less digits than its factorization.

66716773214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28198164 (or 28198151 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 50.

The spelling of 66716773214 in words is "sixty-six billion, seven hundred sixteen million, seven hundred seventy-three thousand, two hundred fourteen".