3566246118821 has 4 divisors (see below), whose sum is σ = 3566250255852. Its totient is φ = 3566241981792.

The previous prime is 3566246118763. The next prime is 3566246118829. The reversal of 3566246118821 is 1288116426653.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 332773228225 + 3233472890596 = 576865^2 + 1798186^2 .

It is a cyclic number.

It is not a de Polignac number, because 3566246118821 - 2¹⁴ = 3566246102437 is a prime.

It is a super-2 number, since 2×3566246118821² (a number of 26 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 (3566246118829) 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, 231896 + ... + 2680721.

It is an arithmetic number, because the mean of its divisors is an integer number (891562563963).

Almost surely, 2^{3566246118821} is an apocalyptic number.

It is an amenable number.

3566246118821 is a deficient number, since it is larger than the sum of its proper divisors (4137031).

3566246118821 is a wasteful number, since it uses less digits than its factorization.

3566246118821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4137030.

The product of its digits is 3317760, while the sum is 53.

The spelling of 3566246118821 in words is "three trillion, five hundred sixty-six billion, two hundred forty-six million, one hundred eighteen thousand, eight hundred twenty-one".