1666225052 has 12 divisors (see below), whose sum is σ = 2919823536. Its totient is φ = 831989760.

The previous prime is 1666225051. The next prime is 1666225061. The reversal of 1666225052 is 2505226661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666225051) 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, 277349 + ... + 283292.

It is an arithmetic number, because the mean of its divisors is an integer number (243318628).

Almost surely, 2^1666225052 is an apocalyptic number.

It is an amenable number.

1666225052 is a deficient number, since it is larger than the sum of its proper divisors (1253598484).

1666225052 is a wasteful number, since it uses less digits than its factorization.

1666225052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561388 (or 561386 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The square root of 1666225052 is about 40819.4200350764. The cubic root of 1666225052 is about 1185.5263738296.

It can be divided in two parts, 16662 and 25052, that added together give a palindrome (41714).

The spelling of 1666225052 in words is "one billion, six hundred sixty-six million, two hundred twenty-five thousand, fifty-two".