66847460508453 has 16 divisors (see below), whose sum is σ = 89229333079296. Its totient is φ = 44515282506240.

The previous prime is 66847460508449. The next prime is 66847460508467. The reversal of 66847460508453 is 35480506474866.

It is a happy number.

It is not a de Polignac number, because 66847460508453 - 2² = 66847460508449 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66847460508473) 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, 187789725 + ... + 188145357.

It is an arithmetic number, because the mean of its divisors is an integer number (5576833317456).

Almost surely, 2^{66847460508453} is an apocalyptic number.

It is an amenable number.

66847460508453 is a deficient number, since it is larger than the sum of its proper divisors (22381872570843).

66847460508453 is a wasteful number, since it uses less digits than its factorization.

66847460508453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425324.

The product of its (nonzero) digits is 464486400, while the sum is 66.

The spelling of 66847460508453 in words is "sixty-six trillion, eight hundred forty-seven billion, four hundred sixty million, five hundred eight thousand, four hundred fifty-three".