66743437100 has 72 divisors (see below), whose sum is σ = 150401707008. Its totient is φ = 25681262400.

The previous prime is 66743437093. The next prime is 66743437147. The reversal of 66743437100 is 173434766.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 453239 + ... + 582161.

Almost surely, 2^66743437100 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 66743437100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75200853504).

66743437100 is an abundant number, since it is smaller than the sum of its proper divisors (83658269908).

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

66743437100 is a wasteful number, since it uses less digits than its factorization.

66743437100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129135 (or 129128 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 41.

The spelling of 66743437100 in words is "sixty-six billion, seven hundred forty-three million, four hundred thirty-seven thousand, one hundred".