66834730000 has 100 divisors (see below), whose sum is σ = 163418148828. Its totient is φ = 26468800000.

The previous prime is 66834729991. The next prime is 66834730037. The reversal of 66834730000 is 3743866.

It is a happy number.

It can be written as a sum of positive squares in 10 ways, for example, as 49989805056 + 16844924944 = 223584^2 + 129788^2 .

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

It is a super-2 number, since 2×66834730000² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 976914 + ... + 1043086.

Almost surely, 2^66834730000 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 66834730000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81709074414).

66834730000 is an abundant number, since it is smaller than the sum of its proper divisors (96583418828).

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

66834730000 is a wasteful number, since it uses less digits than its factorization.

66834730000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66302 (or 66281 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 37.

The spelling of 66834730000 in words is "sixty-six billion, eight hundred thirty-four million, seven hundred thirty thousand".