1005556661206 has 8 divisors (see below), whose sum is σ = 1508354507520. Its totient is φ = 502771825368.

The previous prime is 1005556661203. The next prime is 1005556661261. The reversal of 1005556661206 is 6021666555001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1005556661206² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005556661203) 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, 3057046 + ... + 3369961.

It is an arithmetic number, because the mean of its divisors is an integer number (188544313440).

Almost surely, 2^{1005556661206} is an apocalyptic number.

1005556661206 is a deficient number, since it is larger than the sum of its proper divisors (502797846314).

1005556661206 is an equidigital number, since it uses as much as digits as its factorization.

1005556661206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6505238.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 1005556661206 in words is "one trillion, five billion, five hundred fifty-six million, six hundred sixty-one thousand, two hundred six".