66457440453 has 16 divisors (see below), whose sum is σ = 90682989056. Its totient is φ = 43268707440.

The previous prime is 66457440389. The next prime is 66457440473. The reversal of 66457440453 is 35404475466.

It is not a de Polignac number, because 66457440453 - 2⁶ = 66457440389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66457440473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1041126 + ... + 1103112.

It is an arithmetic number, because the mean of its divisors is an integer number (5667686816).

Almost surely, 2^66457440453 is an apocalyptic number.

It is an amenable number.

66457440453 is a deficient number, since it is larger than the sum of its proper divisors (24225548603).

66457440453 is a wasteful number, since it uses less digits than its factorization.

66457440453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70344.

The product of its (nonzero) digits is 4838400, while the sum is 48.

The spelling of 66457440453 in words is "sixty-six billion, four hundred fifty-seven million, four hundred forty thousand, four hundred fifty-three".