166021564203011 has 8 divisors (see below), whose sum is σ = 191768223892464. Its totient is φ = 142050536216320.

The previous prime is 166021564202983. The next prime is 166021564203017. The reversal of 166021564203011 is 110302465120661.

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

It is a cyclic number.

It is not a de Polignac number, because 166021564203011 - 2³⁸ = 165746686296067 is a prime.

It is a super-2 number, since 2×166021564203011² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166021564203017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 443907925490 + ... + 443907925863.

It is an arithmetic number, because the mean of its divisors is an integer number (23971027986558).

Almost surely, 2^{166021564203011} is an apocalyptic number.

166021564203011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

166021564203011 is a deficient number, since it is larger than the sum of its proper divisors (25746659689453).

166021564203011 is a wasteful number, since it uses less digits than its factorization.

166021564203011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887815851381.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 166021564203011 in words is "one hundred sixty-six trillion, twenty-one billion, five hundred sixty-four million, two hundred three thousand, eleven".