166670203538 has 4 divisors (see below), whose sum is σ = 250005305310. Its totient is φ = 83335101768.

The previous prime is 166670203517. The next prime is 166670203543. The reversal of 166670203538 is 835302076661.

166670203538 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 can be written as a sum of positive squares in only one way, i.e., 166641119089 + 29084449 = 408217^2 + 5393^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 166670203492 and 166670203501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41667550883 + ... + 41667550886.

Almost surely, 2^166670203538 is an apocalyptic number.

166670203538 is a deficient number, since it is larger than the sum of its proper divisors (83335101772).

166670203538 is an equidigital number, since it uses as much as digits as its factorization.

166670203538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83335101771.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 166670203538 in words is "one hundred sixty-six billion, six hundred seventy million, two hundred three thousand, five hundred thirty-eight".