66831854000 has 160 divisors (see below), whose sum is σ = 170527032000. Its totient is φ = 25262899200.

The previous prime is 66831853997. The next prime is 66831854003. The reversal of 66831854000 is 45813866.

It is an interprime number because it is at equal distance from previous prime (66831853997) and next prime (66831854003).

It is not an unprimeable number, because it can be changed into a prime (66831854003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17060042 + ... + 17063958.

It is an arithmetic number, because the mean of its divisors is an integer number (1065793950).

Almost surely, 2^66831854000 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 66831854000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85263516000).

66831854000 is an abundant number, since it is smaller than the sum of its proper divisors (103695178000).

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

66831854000 is a wasteful number, since it uses less digits than its factorization.

66831854000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4408 (or 4392 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 66831854000 in words is "sixty-six billion, eight hundred thirty-one million, eight hundred fifty-four thousand".