140666808080 has 20 divisors (see below), whose sum is σ = 327050328972. Its totient is φ = 56266723200.

The previous prime is 140666808059. The next prime is 140666808083. The reversal of 140666808080 is 80808666041.

It can be written as a sum of positive squares in 2 ways, for example, as 90846782464 + 49820025616 = 301408^2 + 223204^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (140666808083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 879167471 + ... + 879167630.

Almost surely, 2^140666808080 is an apocalyptic number.

140666808080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140666808080 is an abundant number, since it is smaller than the sum of its proper divisors (186383520892).

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

140666808080 is a wasteful number, since it uses less digits than its factorization.

140666808080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758335114 (or 1758335108 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 47.

The spelling of 140666808080 in words is "one hundred forty billion, six hundred sixty-six million, eight hundred eight thousand, eighty".