66340815140 has 48 divisors (see below), whose sum is σ = 141699160512. Its totient is φ = 26084040576.

The previous prime is 66340815133. The next prime is 66340815157. The reversal of 66340815140 is 4151804366.

It is a super-2 number, since 2×66340815140² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66340815094 and 66340815103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 572774 + ... + 678786.

It is an arithmetic number, because the mean of its divisors is an integer number (2952065844).

Almost surely, 2^66340815140 is an apocalyptic number.

It is an amenable number.

66340815140 is an abundant number, since it is smaller than the sum of its proper divisors (75358345372).

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

66340815140 is a wasteful number, since it uses less digits than its factorization.

66340815140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106556 (or 106554 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 66340815140 in words is "sixty-six billion, three hundred forty million, eight hundred fifteen thousand, one hundred forty".