1066650100649 has 6 divisors (see below), whose sum is σ = 1240797055914. Its totient is φ = 914271514800.

The previous prime is 1066650100627. The next prime is 1066650100693. The reversal of 1066650100649 is 9460010566601.

It can be written as a sum of positive squares in only one way, i.e., 571747699600 + 494902401049 = 756140^2 + 703493^2 .

It is not a de Polignac number, because 1066650100649 - 2⁸ = 1066650100393 is a prime.

It is a super-2 number, since 2×1066650100649² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1066650102649) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10884184652 + ... + 10884184749.

It is an arithmetic number, because the mean of its divisors is an integer number (206799509319).

Almost surely, 2^{1066650100649} is an apocalyptic number.

It is an amenable number.

1066650100649 is a deficient number, since it is larger than the sum of its proper divisors (174146955265).

1066650100649 is an equidigital number, since it uses as much as digits as its factorization.

1066650100649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21768369415 (or 21768369408 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 1066650100649 in words is "one trillion, sixty-six billion, six hundred fifty million, one hundred thousand, six hundred forty-nine".