1668306476 has 24 divisors (see below), whose sum is σ = 3101406000. Its totient is φ = 782996544.

The previous prime is 1668306473. The next prime is 1668306481. The reversal of 1668306476 is 6746038661.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1668306476.

It is not an unprimeable number, because it can be changed into a prime (1668306473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92411 + ... + 108978.

It is an arithmetic number, because the mean of its divisors is an integer number (129225250).

Almost surely, 2^1668306476 is an apocalyptic number.

It is an amenable number.

1668306476 is a deficient number, since it is larger than the sum of its proper divisors (1433099524).

1668306476 is a wasteful number, since it uses less digits than its factorization.

1668306476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201521 (or 201519 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 1668306476 is about 40844.9075895637. The cubic root of 1668306476 is about 1186.0198158303.

The spelling of 1668306476 in words is "one billion, six hundred sixty-eight million, three hundred six thousand, four hundred seventy-six".