1668733049 has 8 divisors (see below), whose sum is σ = 1706508000. Its totient is φ = 1631274592.

The previous prime is 1668732983. The next prime is 1668733057. The reversal of 1668733049 is 9403378661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1668733049 - 2¹² = 1668728953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1668732994 and 1668733012.

It is not an unprimeable number, because it can be changed into a prime (1668733849) 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, 68444 + ... + 89565.

It is an arithmetic number, because the mean of its divisors is an integer number (213313500).

Almost surely, 2^1668733049 is an apocalyptic number.

It is an amenable number.

1668733049 is a deficient number, since it is larger than the sum of its proper divisors (37774951).

1668733049 is a wasteful number, since it uses less digits than its factorization.

1668733049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158247.

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 1668733049 is about 40850.1291185230. The cubic root of 1668733049 is about 1186.1208925657.

The spelling of 1668733049 in words is "one billion, six hundred sixty-eight million, seven hundred thirty-three thousand, forty-nine".