66837189744 has 160 divisors (see below), whose sum is σ = 207186739200. Its totient is φ = 20507385600.

The previous prime is 66837189697. The next prime is 66837189761. The reversal of 66837189744 is 44798173866.

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, 1999569 + ... + 2032719.

It is an arithmetic number, because the mean of its divisors is an integer number (1294917120).

Almost surely, 2^66837189744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66837189744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103593369600).

66837189744 is an abundant number, since it is smaller than the sum of its proper divisors (140349549456).

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

66837189744 is a wasteful number, since it uses less digits than its factorization.

66837189744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33540 (or 33528 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 63.

The spelling of 66837189744 in words is "sixty-six billion, eight hundred thirty-seven million, one hundred eighty-nine thousand, seven hundred forty-four".