43666676767457 has 2 divisors, whose sum is σ = 43666676767458. Its totient is φ = 43666676767456.

The previous prime is 43666676767451. The next prime is 43666676767463. The reversal of 43666676767457 is 75476767666634.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (43666676767451) and next prime (43666676767463).

It can be written as a sum of positive squares in only one way, i.e., 36413005793761 + 7253670973696 = 6034319^2 + 2693264^2 .

It is a cyclic number.

It is not a de Polignac number, because 43666676767457 - 2²⁴ = 43666659990241 is a prime.

It is not a weakly prime, because it can be changed into another prime (43666676767451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21833338383728 + 21833338383729.

It is an arithmetic number, because the mean of its divisors is an integer number (21833338383729).

Almost surely, 2^{43666676767457} is an apocalyptic number.

It is an amenable number.

43666676767457 is a deficient number, since it is larger than the sum of its proper divisors (1).

43666676767457 is an equidigital number, since it uses as much as digits as its factorization.

43666676767457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26885053440, while the sum is 80.

The spelling of 43666676767457 in words is "forty-three trillion, six hundred sixty-six billion, six hundred seventy-six million, seven hundred sixty-seven thousand, four hundred fifty-seven".