66771416043 has 16 divisors (see below), whose sum is σ = 101333316000. Its totient is φ = 43428562560.

The previous prime is 66771416039. The next prime is 66771416059. The reversal of 66771416043 is 34061417766.

It is not a de Polignac number, because 66771416043 - 2² = 66771416039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66771416043.

It is not an unprimeable number, because it can be changed into a prime (66771416143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30157618 + ... + 30159831.

It is an arithmetic number, because the mean of its divisors is an integer number (6333332250).

Almost surely, 2^66771416043 is an apocalyptic number.

66771416043 is a deficient number, since it is larger than the sum of its proper divisors (34561899957).

66771416043 is a wasteful number, since it uses less digits than its factorization.

66771416043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60317499 (or 60317493 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 66771416043 in words is "sixty-six billion, seven hundred seventy-one million, four hundred sixteen thousand, forty-three".