66157071100 has 72 divisors (see below), whose sum is σ = 147834038016. Its totient is φ = 25681920000.

The previous prime is 66157071067. The next prime is 66157071121. The reversal of 66157071100 is 117075166.

It is a congruent number.

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, 740860 + ... + 825340.

It is an arithmetic number, because the mean of its divisors is an integer number (2053250528).

Almost surely, 2^66157071100 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 66157071100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73917019008).

66157071100 is an abundant number, since it is smaller than the sum of its proper divisors (81676966916).

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

66157071100 is a wasteful number, since it uses less digits than its factorization.

66157071100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84727 (or 84720 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 34.

The spelling of 66157071100 in words is "sixty-six billion, one hundred fifty-seven million, seventy-one thousand, one hundred".