66446846457 has 16 divisors (see below), whose sum is σ = 90766460928. Its totient is φ = 43215071760.

The previous prime is 66446846419. The next prime is 66446846497. The reversal of 66446846457 is 75464864466.

It is not a de Polignac number, because 66446846457 - 2⁶ = 66446846393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66446846457.

It is not an unprimeable number, because it can be changed into a prime (66446846497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206769 + ... + 419102.

It is an arithmetic number, because the mean of its divisors is an integer number (5672903808).

Almost surely, 2^66446846457 is an apocalyptic number.

It is an amenable number.

66446846457 is a deficient number, since it is larger than the sum of its proper divisors (24319614471).

66446846457 is a wasteful number, since it uses less digits than its factorization.

66446846457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626740.

The product of its digits is 92897280, while the sum is 60.

The spelling of 66446846457 in words is "sixty-six billion, four hundred forty-six million, eight hundred forty-six thousand, four hundred fifty-seven".