2166725054 has 16 divisors (see below), whose sum is σ = 3531073392. Its totient is φ = 991175808.

The previous prime is 2166725039. The next prime is 2166725081. The reversal of 2166725054 is 4505276612.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2166724999 and 2166725017.

It is a congruent 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, 365804 + ... + 371679.

It is an arithmetic number, because the mean of its divisors is an integer number (220692087).

Almost surely, 2^2166725054 is an apocalyptic number.

2166725054 is a deficient number, since it is larger than the sum of its proper divisors (1364348338).

2166725054 is a wasteful number, since it uses less digits than its factorization.

2166725054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737611.

The product of its (nonzero) digits is 100800, while the sum is 38.

The square root of 2166725054 is about 46548.0939889057. The cubic root of 2166725054 is about 1294.0009694799. Note that the first 3 decimals are identical.

The spelling of 2166725054 in words is "two billion, one hundred sixty-six million, seven hundred twenty-five thousand, fifty-four".