66343543472 has 80 divisors (see below), whose sum is σ = 133913809920. Its totient is φ = 31817028096.

The previous prime is 66343543439. The next prime is 66343543499. The reversal of 66343543472 is 27434534366.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12000773 + ... + 12006299.

It is an arithmetic number, because the mean of its divisors is an integer number (1673922624).

Almost surely, 2^66343543472 is an apocalyptic number.

It is an amenable number.

66343543472 is an abundant number, since it is smaller than the sum of its proper divisors (67570266448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66343543472 is a wasteful number, since it uses less digits than its factorization.

66343543472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5890 (or 5884 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 47.

The spelling of 66343543472 in words is "sixty-six billion, three hundred forty-three million, five hundred forty-three thousand, four hundred seventy-two".