140066816 has 60 divisors (see below), whose sum is σ = 286252512. Its totient is φ = 68517888.

The previous prime is 140066809. The next prime is 140066821. The reversal of 140066816 is 618660041.

It is a happy number.

140066816 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1359821 + ... + 1359923.

Almost surely, 2^140066816 is an apocalyptic number.

140066816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140066816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143126256).

140066816 is an abundant number, since it is smaller than the sum of its proper divisors (146185696).

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

140066816 is an frugal number, since it uses more digits than its factorization.

140066816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 140066816 is about 11834.9827207309. The cubic root of 140066816 is about 519.3320022106.

The spelling of 140066816 in words is "one hundred forty million, sixty-six thousand, eight hundred sixteen".