1166285874533 has 8 divisors (see below), whose sum is σ = 1256009104728. Its totient is φ = 1076563920384.

The previous prime is 1166285874491. The next prime is 1166285874673. The reversal of 1166285874533 is 3354785826611.

It can be written as a sum of positive squares in 4 ways, for example, as 24375640129 + 1141910234404 = 156127^2 + 1068602^2 .

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 1166285874533 - 2¹⁰ = 1166285873509 is a prime.

It is a super-2 number, since 2×1166285874533² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166285874233) 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, 2505641 + ... + 2934417.

It is an arithmetic number, because the mean of its divisors is an integer number (157001138091).

Almost surely, 2^{1166285874533} is an apocalyptic number.

1166285874533 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1166285874533 is a deficient number, since it is larger than the sum of its proper divisors (89723230195).

1166285874533 is a wasteful number, since it uses less digits than its factorization.

1166285874533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638023.

The product of its digits is 29030400, while the sum is 59.

The spelling of 1166285874533 in words is "one trillion, one hundred sixty-six billion, two hundred eighty-five million, eight hundred seventy-four thousand, five hundred thirty-three".