66532832157 has 48 divisors (see below), whose sum is σ = 98427558656. Its totient is φ = 39944361600.

The previous prime is 66532832147. The next prime is 66532832173. The reversal of 66532832157 is 75123823566.

It is a happy number.

It is not a de Polignac number, because 66532832157 - 2⁴ = 66532832141 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 (66532832117) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20914107 + ... + 20917287.

Almost surely, 2^66532832157 is an apocalyptic number.

It is an amenable number.

66532832157 is a deficient number, since it is larger than the sum of its proper divisors (31894726499).

66532832157 is a wasteful number, since it uses less digits than its factorization.

66532832157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3730 (or 3719 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 48.

The spelling of 66532832157 in words is "sixty-six billion, five hundred thirty-two million, eight hundred thirty-two thousand, one hundred fifty-seven".