1866466836433 has 16 divisors (see below), whose sum is σ = 1986351078096. Its totient is φ = 1747724185600.

The previous prime is 1866466836431. The next prime is 1866466836463. The reversal of 1866466836433 is 3346386646681.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 355182624784 + 1511284211649 = 595972^2 + 1229343^2 .

It is a cyclic number.

It is not a de Polignac number, because 1866466836433 - 2¹ = 1866466836431 is a prime.

It is a super-2 number, since 2×1866466836433² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1866466836431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2637783 + ... + 3269683.

It is an arithmetic number, because the mean of its divisors is an integer number (124146942381).

Almost surely, 2^{1866466836433} is an apocalyptic number.

It is an amenable number.

1866466836433 is a deficient number, since it is larger than the sum of its proper divisors (119884241663).

1866466836433 is a wasteful number, since it uses less digits than its factorization.

1866466836433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632804.

The product of its digits is 214990848, while the sum is 64.

The spelling of 1866466836433 in words is "one trillion, eight hundred sixty-six billion, four hundred sixty-six million, eight hundred thirty-six thousand, four hundred thirty-three".