166021564202958 has 32 divisors (see below), whose sum is σ = 337000560462720. Its totient is φ = 54514290394080.

The previous prime is 166021564202957. The next prime is 166021564202983. The reversal of 166021564202958 is 859202465120661.

It is a junction number, because it is equal to n+sod(n) for n = 166021564202898 and 166021564202907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166021564202957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98583253 + ... + 100253183.

It is an arithmetic number, because the mean of its divisors is an integer number (10531267514460).

Almost surely, 2^{166021564202958} is an apocalyptic number.

166021564202958 is an abundant number, since it is smaller than the sum of its proper divisors (170978996259762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166021564202958 is a wasteful number, since it uses less digits than its factorization.

166021564202958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917312.

The product of its (nonzero) digits is 12441600, while the sum is 57.

The spelling of 166021564202958 in words is "one hundred sixty-six trillion, twenty-one billion, five hundred sixty-four million, two hundred two thousand, nine hundred fifty-eight".