166605161566063 has 24 divisors (see below), whose sum is σ = 185711259111840. Its totient is φ = 149322789369600.

The previous prime is 166605161566037. The next prime is 166605161566073. The reversal of 166605161566063 is 360665161506661.

It is not a de Polignac number, because 166605161566063 - 2⁵ = 166605161566031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166605161565989 and 166605161566007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166605161566073) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 456248731 + ... + 456613747.

It is an arithmetic number, because the mean of its divisors is an integer number (7737969129660).

Almost surely, 2^{166605161566063} is an apocalyptic number.

166605161566063 is a deficient number, since it is larger than the sum of its proper divisors (19106097545777).

166605161566063 is a wasteful number, since it uses less digits than its factorization.

166605161566063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418239 (or 418228 counting only the distinct ones).

The product of its (nonzero) digits is 20995200, while the sum is 58.

The spelling of 166605161566063 in words is "one hundred sixty-six trillion, six hundred five billion, one hundred sixty-one million, five hundred sixty-six thousand, sixty-three".