66591497103 has 32 divisors (see below), whose sum is σ = 93740924160. Its totient is φ = 41932396800.

The previous prime is 66591497101. The next prime is 66591497143. The reversal of 66591497103 is 30179419566.

It is not a de Polignac number, because 66591497103 - 2¹ = 66591497101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66591497101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46469275 + ... + 46470707.

It is an arithmetic number, because the mean of its divisors is an integer number (2929403880).

Almost surely, 2^66591497103 is an apocalyptic number.

66591497103 is a deficient number, since it is larger than the sum of its proper divisors (27149427057).

66591497103 is a wasteful number, since it uses less digits than its factorization.

66591497103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3319.

The product of its (nonzero) digits is 1224720, while the sum is 51.

The spelling of 66591497103 in words is "sixty-six billion, five hundred ninety-one million, four hundred ninety-seven thousand, one hundred three".