1668700052 has 6 divisors (see below), whose sum is σ = 2920225098. Its totient is φ = 834350024.

The previous prime is 1668700051. The next prime is 1668700063. The reversal of 1668700052 is 2500078661.

It can be written as a sum of positive squares in only one way, i.e., 1101974416 + 566725636 = 33196^2 + 23806^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1668699985 and 1668700021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668700051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208587503 + ... + 208587510.

It is an arithmetic number, because the mean of its divisors is an integer number (486704183).

Almost surely, 2^1668700052 is an apocalyptic number.

It is an amenable number.

1668700052 is a deficient number, since it is larger than the sum of its proper divisors (1251525046).

1668700052 is a wasteful number, since it uses less digits than its factorization.

1668700052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417175017 (or 417175015 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 1668700052 is about 40849.7252377540. The cubic root of 1668700052 is about 1186.1130745209.

The spelling of 1668700052 in words is "one billion, six hundred sixty-eight million, seven hundred thousand, fifty-two".