166206440406530 has 16 divisors (see below), whose sum is σ = 308822289272064. Its totient is φ = 64337976931440.

The previous prime is 166206440406497. The next prime is 166206440406569. The reversal of 166206440406530 is 35604044602661.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268074903572 + ... + 268074904191.

It is an arithmetic number, because the mean of its divisors is an integer number (19301393079504).

Almost surely, 2^{166206440406530} is an apocalyptic number.

166206440406530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

166206440406530 is a deficient number, since it is larger than the sum of its proper divisors (142615848865534).

166206440406530 is a wasteful number, since it uses less digits than its factorization.

166206440406530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536149807801.

The product of its (nonzero) digits is 2488320, while the sum is 47.

The spelling of 166206440406530 in words is "one hundred sixty-six trillion, two hundred six billion, four hundred forty million, four hundred six thousand, five hundred thirty".