1001005600066 has 4 divisors (see below), whose sum is σ = 1501508400102. Its totient is φ = 500502800032.

The previous prime is 1001005600061. The next prime is 1001005600081. The reversal of 1001005600066 is 6600065001001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 981872901025 + 19132699041 = 990895^2 + 138321^2 .

It is a super-2 number, since 2×1001005600066² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1001005600066.

It is not an unprimeable number, because it can be changed into a prime (1001005600061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250251400015 + ... + 250251400018.

Almost surely, 2^{1001005600066} is an apocalyptic number.

1001005600066 is a deficient number, since it is larger than the sum of its proper divisors (500502800036).

1001005600066 is an equidigital number, since it uses as much as digits as its factorization.

1001005600066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500502800035.

The product of its (nonzero) digits is 1080, while the sum is 25.

The spelling of 1001005600066 in words is "one trillion, one billion, five million, six hundred thousand, sixty-six".