66746734814 has 8 divisors (see below), whose sum is σ = 100254855600. Its totient is φ = 33328449616.

The previous prime is 66746734811. The next prime is 66746734829. The reversal of 66746734814 is 41843764766.

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

It is a super-2 number, since 2×66746734814² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66746734814.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66746734811) 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, 22457039 + ... + 22460010.

It is an arithmetic number, because the mean of its divisors is an integer number (12531856950).

Almost surely, 2^66746734814 is an apocalyptic number.

66746734814 is a deficient number, since it is larger than the sum of its proper divisors (33508120786).

66746734814 is a wasteful number, since it uses less digits than its factorization.

66746734814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44917794.

The product of its digits is 16257024, while the sum is 56.

The spelling of 66746734814 in words is "sixty-six billion, seven hundred forty-six million, seven hundred thirty-four thousand, eight hundred fourteen".