1660105005533 has 4 divisors (see below), whose sum is σ = 1787805390588. Its totient is φ = 1532404620480.

The previous prime is 1660105005527. The next prime is 1660105005599. The reversal of 1660105005533 is 3355005010661.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 238482792409 + 1421622213124 = 488347^2 + 1192318^2 .

It is a cyclic number.

It is not a de Polignac number, because 1660105005533 - 2³⁸ = 1385227098589 is a prime.

It is a super-2 number, since 2×1660105005533² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1660105005493 and 1660105005502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660105095533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63850192508 + ... + 63850192533.

It is an arithmetic number, because the mean of its divisors is an integer number (446951347647).

Almost surely, 2^{1660105005533} is an apocalyptic number.

1660105005533 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1660105005533 is a deficient number, since it is larger than the sum of its proper divisors (127700385055).

1660105005533 is a wasteful number, since it uses less digits than its factorization.

1660105005533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127700385054.

The product of its (nonzero) digits is 40500, while the sum is 35.

The spelling of 1660105005533 in words is "one trillion, six hundred sixty billion, one hundred five million, five thousand, five hundred thirty-three".