1065011556661 has 8 divisors (see below), whose sum is σ = 1148513160704. Its totient is φ = 981735329520.

The previous prime is 1065011556643. The next prime is 1065011556677. The reversal of 1065011556661 is 1666551105601.

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

It is a cyclic number.

It is not a de Polignac number, because 1065011556661 - 2¹¹ = 1065011554613 is a prime.

It is a super-2 number, since 2×1065011556661² (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 (1065011556691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56334405 + ... + 56353306.

It is an arithmetic number, because the mean of its divisors is an integer number (143564145088).

Almost surely, 2^{1065011556661} is an apocalyptic number.

It is an amenable number.

1065011556661 is a deficient number, since it is larger than the sum of its proper divisors (83501604043).

1065011556661 is a wasteful number, since it uses less digits than its factorization.

1065011556661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112688451.

The product of its (nonzero) digits is 162000, while the sum is 43.

The spelling of 1065011556661 in words is "one trillion, sixty-five billion, eleven million, five hundred fifty-six thousand, six hundred sixty-one".