166416106165426 has 8 divisors (see below), whose sum is σ = 268826017651884. Its totient is φ = 76807433614800.

The previous prime is 166416106165423. The next prime is 166416106165453. The reversal of 166416106165426 is 624561601614661.

It can be written as a sum of positive squares in 2 ways, for example, as 145290454215201 + 21125651950225 = 12053649^2 + 4596265^2 .

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

It is a super-2 number, since 2×166416106165426² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (166416106165423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3200309733925 + ... + 3200309733976.

Almost surely, 2^{166416106165426} is an apocalyptic number.

166416106165426 is a deficient number, since it is larger than the sum of its proper divisors (102409911486458).

166416106165426 is a wasteful number, since it uses less digits than its factorization.

166416106165426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6400619467916.

The product of its (nonzero) digits is 7464960, while the sum is 55.

The spelling of 166416106165426 in words is "one hundred sixty-six trillion, four hundred sixteen billion, one hundred six million, one hundred sixty-five thousand, four hundred twenty-six".