66457813752575 has 24 divisors (see below), whose sum is σ = 95776490924160. Its totient is φ = 44798681224800.

The previous prime is 66457813752569. The next prime is 66457813752619. The reversal of 66457813752575 is 57525731875466.

It is not a de Polignac number, because 66457813752575 - 2¹² = 66457813748479 is a prime.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66457813752499 and 66457813752508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3218285741 + ... + 3218306390.

It is an arithmetic number, because the mean of its divisors is an integer number (3990687121840).

Almost surely, 2^{66457813752575} is an apocalyptic number.

66457813752575 is a deficient number, since it is larger than the sum of its proper divisors (29318677171585).

66457813752575 is a wasteful number, since it uses less digits than its factorization.

66457813752575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6436592207 (or 6436592202 counting only the distinct ones).

The product of its digits is 1481760000, while the sum is 71.

The spelling of 66457813752575 in words is "sixty-six trillion, four hundred fifty-seven billion, eight hundred thirteen million, seven hundred fifty-two thousand, five hundred seventy-five".