66954770000 has 100 divisors (see below), whose sum is σ = 162235393056. Its totient is φ = 26760240000.

The previous prime is 66954769963. The next prime is 66954770009. The reversal of 66954770000 is 7745966.

66954770000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (100).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66954770009) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19068245 + ... + 19071755.

Almost surely, 2^66954770000 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 66954770000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81117696528).

66954770000 is an abundant number, since it is smaller than the sum of its proper divisors (95280623056).

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

66954770000 is a wasteful number, since it uses less digits than its factorization.

66954770000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5446 (or 5425 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 44.

The spelling of 66954770000 in words is "sixty-six billion, nine hundred fifty-four million, seven hundred seventy thousand".