166025203051 has 4 divisors (see below), whose sum is σ = 166769710912. Its totient is φ = 165280695192.

The previous prime is 166025203037. The next prime is 166025203081. The reversal of 166025203051 is 150302520661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 166025203051 - 2⁷ = 166025202923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166025203031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372253596 + ... + 372254041.

It is an arithmetic number, because the mean of its divisors is an integer number (41692427728).

Almost surely, 2^166025203051 is an apocalyptic number.

166025203051 is a deficient number, since it is larger than the sum of its proper divisors (744507861).

166025203051 is an equidigital number, since it uses as much as digits as its factorization.

166025203051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744507860.

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 166025203051 in words is "one hundred sixty-six billion, twenty-five million, two hundred three thousand, fifty-one".