1066116651609 has 16 divisors (see below), whose sum is σ = 1474081361792. Its totient is φ = 684821184768.

The previous prime is 1066116651581. The next prime is 1066116651643. The reversal of 1066116651609 is 9061566116601.

It is not a de Polignac number, because 1066116651609 - 2⁹ = 1066116651097 is a prime.

It is a super-2 number, since 2×1066116651609² (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 (1066116651659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46613104 + ... + 46635969.

It is an arithmetic number, because the mean of its divisors is an integer number (92130085112).

Almost surely, 2^{1066116651609} is an apocalyptic number.

It is an amenable number.

1066116651609 is a deficient number, since it is larger than the sum of its proper divisors (407964710183).

1066116651609 is a wasteful number, since it uses less digits than its factorization.

1066116651609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93249216.

The product of its (nonzero) digits is 349920, while the sum is 48.

The spelling of 1066116651609 in words is "one trillion, sixty-six billion, one hundred sixteen million, six hundred fifty-one thousand, six hundred nine".