2066640537748 has 12 divisors (see below), whose sum is σ = 3616631426772. Its totient is φ = 1033317272960.

The previous prime is 2066640537733. The next prime is 2066640537749. The reversal of 2066640537748 is 8477350466602.

It can be written as a sum of positive squares in 2 ways, for example, as 173187480964 + 1893453056784 = 416158^2 + 1376028^2 .

It is a super-2 number, since 2×2066640537748² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2066640537692 and 2066640537701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066640537749) 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, 1674186 + ... + 2633662.

It is an arithmetic number, because the mean of its divisors is an integer number (301385952231).

Almost surely, 2^{2066640537748} is an apocalyptic number.

It is an amenable number.

2066640537748 is a deficient number, since it is larger than the sum of its proper divisors (1549990889024).

2066640537748 is a wasteful number, since it uses less digits than its factorization.

2066640537748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497962 (or 1497960 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 58.

The spelling of 2066640537748 in words is "two trillion, sixty-six billion, six hundred forty million, five hundred thirty-seven thousand, seven hundred forty-eight".