166442546626403 has 4 divisors (see below), whose sum is σ = 170940993832560. Its totient is φ = 161944099420248.

The previous prime is 166442546626379. The next prime is 166442546626417. The reversal of 166442546626403 is 304626645244661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166442546626403 - 2²⁰ = 166442545577827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166442546626463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2249223603023 + ... + 2249223603096.

It is an arithmetic number, because the mean of its divisors is an integer number (42735248458140).

Almost surely, 2^{166442546626403} is an apocalyptic number.

166442546626403 is a deficient number, since it is larger than the sum of its proper divisors (4498447206157).

166442546626403 is an equidigital number, since it uses as much as digits as its factorization.

166442546626403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4498447206156.

The product of its (nonzero) digits is 119439360, while the sum is 59.

The spelling of 166442546626403 in words is "one hundred sixty-six trillion, four hundred forty-two billion, five hundred forty-six million, six hundred twenty-six thousand, four hundred three".