166632620561458 has 8 divisors (see below), whose sum is σ = 252757345795740. Its totient is φ = 82380171962880.

The previous prime is 166632620561441. The next prime is 166632620561489. The reversal of 166632620561458 is 854165026236661.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 139315931549089 + 27316689012369 = 11803217^2 + 5226537^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 166632620561396 and 166632620561405.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 468069158703 + ... + 468069159058.

Almost surely, 2^{166632620561458} is an apocalyptic number.

166632620561458 is a deficient number, since it is larger than the sum of its proper divisors (86124725234282).

166632620561458 is an equidigital number, since it uses as much as digits as its factorization.

166632620561458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936138317852.

The product of its (nonzero) digits is 74649600, while the sum is 61.

The spelling of 166632620561458 in words is "one hundred sixty-six trillion, six hundred thirty-two billion, six hundred twenty million, five hundred sixty-one thousand, four hundred fifty-eight".