1040666520256 has 28 divisors (see below), whose sum is σ = 2252806502760. Its totient is φ = 473030236160.

The previous prime is 1040666520217. The next prime is 1040666520259. The reversal of 1040666520256 is 6520256660401.

It is a happy number.

It is a super-3 number, since 3×1040666520256³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1040666520259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 739109041 + ... + 739110448.

Almost surely, 2^{1040666520256} is an apocalyptic number.

1040666520256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1040666520256 is an abundant number, since it is smaller than the sum of its proper divisors (1212139982504).

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

1040666520256 is a wasteful number, since it uses less digits than its factorization.

1040666520256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478219512 (or 1478219502 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 1040666520256 in words is "one trillion, forty billion, six hundred sixty-six million, five hundred twenty thousand, two hundred fifty-six".