2166625652 has 6 divisors (see below), whose sum is σ = 3791594898. Its totient is φ = 1083312824.

The previous prime is 2166625627. The next prime is 2166625667. The reversal of 2166625652 is 2565266612.

It can be written as a sum of positive squares in only one way, i.e., 1737555856 + 429069796 = 41684^2 + 20714^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270828203 + ... + 270828210.

It is an arithmetic number, because the mean of its divisors is an integer number (631932483).

Almost surely, 2^2166625652 is an apocalyptic number.

It is an amenable number.

2166625652 is a deficient number, since it is larger than the sum of its proper divisors (1624969246).

2166625652 is a wasteful number, since it uses less digits than its factorization.

2166625652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541656417 (or 541656415 counting only the distinct ones).

The product of its digits is 259200, while the sum is 41.

The square root of 2166625652 is about 46547.0262422853. The cubic root of 2166625652 is about 1293.9811810514.

The spelling of 2166625652 in words is "two billion, one hundred sixty-six million, six hundred twenty-five thousand, six hundred fifty-two".