166071055551203 has 24 divisors (see below), whose sum is σ = 193300078929984. Its totient is φ = 141466921308800.

The previous prime is 166071055551097. The next prime is 166071055551251. The reversal of 166071055551203 is 302155550170661.

It is not a de Polignac number, because 166071055551203 - 2²⁶ = 166070988442339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166071055551283) 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, 114344513 + ... + 115787778.

It is an arithmetic number, because the mean of its divisors is an integer number (8054169955416).

Almost surely, 2^{166071055551203} is an apocalyptic number.

166071055551203 is a deficient number, since it is larger than the sum of its proper divisors (27229023378781).

166071055551203 is a wasteful number, since it uses less digits than its factorization.

166071055551203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230132563 (or 230132546 counting only the distinct ones).

The product of its (nonzero) digits is 945000, while the sum is 47.

The spelling of 166071055551203 in words is "one hundred sixty-six trillion, seventy-one billion, fifty-five million, five hundred fifty-one thousand, two hundred three".