66240024040 has 64 divisors (see below), whose sum is σ = 158346478800. Its totient is φ = 24890923008.

The previous prime is 66240024029. The next prime is 66240024061. The reversal of 66240024040 is 4042004266.

It can be written as a sum of positive squares in 8 ways, for example, as 42957536644 + 23282487396 = 207262^2 + 152586^2 .

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, 728749 + ... + 814588.

Almost surely, 2^66240024040 is an apocalyptic number.

It is an amenable number.

66240024040 is an abundant number, since it is smaller than the sum of its proper divisors (92106454760).

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

66240024040 is a wasteful number, since it uses less digits than its factorization.

66240024040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543414 (or 1543410 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The spelling of 66240024040 in words is "sixty-six billion, two hundred forty million, twenty-four thousand, forty".