66986920000 has 840 divisors, whose sum is σ = 227955530880. Its totient is φ = 19192320000.

The previous prime is 66986919983. The next prime is 66986920027. The reversal of 66986920000 is 2968966.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 280279881 + ... + 280280119.

It is an arithmetic number, because the mean of its divisors is an integer number (271375632).

Almost surely, 2^66986920000 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 66986920000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113977765440).

66986920000 is an abundant number, since it is smaller than the sum of its proper divisors (160968610880).

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

66986920000 is a wasteful number, since it uses less digits than its factorization.

66986920000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The spelling of 66986920000 in words is "sixty-six billion, nine hundred eighty-six million, nine hundred twenty thousand".