1668366667 has 16 divisors (see below), whose sum is σ = 1871073792. Its totient is φ = 1474247520.

The previous prime is 1668366647. The next prime is 1668366697. The reversal of 1668366667 is 7666638661.

It is a cyclic number.

It is not a de Polignac number, because 1668366667 - 2¹⁵ = 1668333899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1668366647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 807678 + ... + 809740.

It is an arithmetic number, because the mean of its divisors is an integer number (116942112).

Almost surely, 2^1668366667 is an apocalyptic number.

1668366667 is a deficient number, since it is larger than the sum of its proper divisors (202707125).

1668366667 is a wasteful number, since it uses less digits than its factorization.

1668366667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098.

The product of its digits is 7838208, while the sum is 55.

The square root of 1668366667 is about 40845.6444067173. The cubic root of 1668366667 is about 1186.0340791688.

The spelling of 1668366667 in words is "one billion, six hundred sixty-eight million, three hundred sixty-six thousand, six hundred sixty-seven".