166122402505503 has 4 divisors (see below), whose sum is σ = 221496536674008. Its totient is φ = 110748268337000.

The previous prime is 166122402505441. The next prime is 166122402505513. The reversal of 166122402505503 is 305505204221661.

166122402505503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 166122402505503 - 2³⁰ = 166121328763679 is a prime.

It is a super-2 number, since 2×166122402505503² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166122402505513) 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, 27687067084248 + ... + 27687067084253.

It is an arithmetic number, because the mean of its divisors is an integer number (55374134168502).

Almost surely, 2^{166122402505503} is an apocalyptic number.

166122402505503 is a deficient number, since it is larger than the sum of its proper divisors (55374134168505).

166122402505503 is an equidigital number, since it uses as much as digits as its factorization.

166122402505503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55374134168504.

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 166122402505503 in words is "one hundred sixty-six trillion, one hundred twenty-two billion, four hundred two million, five hundred five thousand, five hundred three".