1600065660061 has 12 divisors (see below), whose sum is σ = 1759391867772. Its totient is φ = 1454074160000.

The previous prime is 1600065660049. The next prime is 1600065660073. The reversal of 1600065660061 is 1600665600061.

It is an interprime number because it is at equal distance from previous prime (1600065660049) and next prime (1600065660073).

It can be written as a sum of positive squares in 2 ways, for example, as 1089956880100 + 510108779961 = 1044010^2 + 714219^2 .

It is not a de Polignac number, because 1600065660061 - 2¹¹ = 1600065658013 is a prime.

It is a super-2 number, since 2×1600065660061² (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 1600065660061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1600065660031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2080540 + ... + 2743861.

It is an arithmetic number, because the mean of its divisors is an integer number (146615988981).

Almost surely, 2^{1600065660061} is an apocalyptic number.

1600065660061 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1600065660061 is a deficient number, since it is larger than the sum of its proper divisors (159326207711).

1600065660061 is a wasteful number, since it uses less digits than its factorization.

1600065660061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4827164 (or 4827153 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 1600065660061 in words is "one trillion, six hundred billion, sixty-five million, six hundred sixty thousand, sixty-one".