3866456155673 has 2 divisors, whose sum is σ = 3866456155674. Its totient is φ = 3866456155672.

The previous prime is 3866456155669. The next prime is 3866456155691. The reversal of 3866456155673 is 3765516546683.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3686910737689 + 179545417984 = 1920133^2 + 423728^2 .

It is a cyclic number.

It is not a de Polignac number, because 3866456155673 - 2² = 3866456155669 is a prime.

It is not a weakly prime, because it can be changed into another prime (3866456155633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1933228077836 + 1933228077837.

It is an arithmetic number, because the mean of its divisors is an integer number (1933228077837).

Almost surely, 2^{3866456155673} is an apocalyptic number.

It is an amenable number.

3866456155673 is a deficient number, since it is larger than the sum of its proper divisors (1).

3866456155673 is an equidigital number, since it uses as much as digits as its factorization.

3866456155673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592000, while the sum is 65.

The spelling of 3866456155673 in words is "three trillion, eight hundred sixty-six billion, four hundred fifty-six million, one hundred fifty-five thousand, six hundred seventy-three".