66704326157 has 12 divisors (see below), whose sum is σ = 78047632800. Its totient is φ = 55845471528.

The previous prime is 66704326127. The next prime is 66704326163. The reversal of 66704326157 is 75162340766.

It is not a de Polignac number, because 66704326157 - 2¹⁰ = 66704325133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66704326127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2563907 + ... + 2589792.

It is an arithmetic number, because the mean of its divisors is an integer number (6503969400).

Almost surely, 2^66704326157 is an apocalyptic number.

It is an amenable number.

66704326157 is a deficient number, since it is larger than the sum of its proper divisors (11343306643).

66704326157 is an equidigital number, since it uses as much as digits as its factorization.

66704326157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5153792 (or 5153749 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 47.

The spelling of 66704326157 in words is "sixty-six billion, seven hundred four million, three hundred twenty-six thousand, one hundred fifty-seven".