2066078461823 has 4 divisors (see below), whose sum is σ = 2110037578080. Its totient is φ = 2022119345568.

The previous prime is 2066078461807. The next prime is 2066078461847. The reversal of 2066078461823 is 3281648706602.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2066078461823 - 2⁴ = 2066078461807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066078461883) 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, 21979558058 + ... + 21979558151.

It is an arithmetic number, because the mean of its divisors is an integer number (527509394520).

Almost surely, 2^{2066078461823} is an apocalyptic number.

2066078461823 is a deficient number, since it is larger than the sum of its proper divisors (43959116257).

2066078461823 is an equidigital number, since it uses as much as digits as its factorization.

2066078461823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43959116256.

The product of its (nonzero) digits is 4644864, while the sum is 53.

The spelling of 2066078461823 in words is "two trillion, sixty-six billion, seventy-eight million, four hundred sixty-one thousand, eight hundred twenty-three".