66743137836 has 120 divisors (see below), whose sum is σ = 175886393760. Its totient is φ = 22068937728.

The previous prime is 66743137829. The next prime is 66743137843. The reversal of 66743137836 is 63873134766.

It is an interprime number because it is at equal distance from previous prime (66743137829) and next prime (66743137843).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 35331580 + ... + 35333468.

It is an arithmetic number, because the mean of its divisors is an integer number (1465719948).

Almost surely, 2^66743137836 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 66743137836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87943196880).

66743137836 is an abundant number, since it is smaller than the sum of its proper divisors (109143255924).

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

66743137836 is a wasteful number, since it uses less digits than its factorization.

66743137836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2725 (or 2714 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 54.

The spelling of 66743137836 in words is "sixty-six billion, seven hundred forty-three million, one hundred thirty-seven thousand, eight hundred thirty-six".