166132530521 has 8 divisors (see below), whose sum is σ = 172070086080. Its totient is φ = 160208898192.

The previous prime is 166132530517. The next prime is 166132530539. The reversal of 166132530521 is 125035231661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166132530521 - 2² = 166132530517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166132530121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3456515 + ... + 3504248.

It is an arithmetic number, because the mean of its divisors is an integer number (21508760760).

Almost surely, 2^166132530521 is an apocalyptic number.

It is an amenable number.

166132530521 is a deficient number, since it is larger than the sum of its proper divisors (5937555559).

166132530521 is an equidigital number, since it uses as much as digits as its factorization.

166132530521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6961615.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 166132530521 in words is "one hundred sixty-six billion, one hundred thirty-two million, five hundred thirty thousand, five hundred twenty-one".