1666975367 has 16 divisors (see below), whose sum is σ = 1766054400. Its totient is φ = 1571596992.

The previous prime is 1666975357. The next prime is 1666975379. The reversal of 1666975367 is 7635796661.

It is a cyclic number.

It is not a de Polignac number, because 1666975367 - 2⁴ = 1666975351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666975337) 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, 141884 + ... + 153182.

It is an arithmetic number, because the mean of its divisors is an integer number (110378400).

Almost surely, 2^1666975367 is an apocalyptic number.

1666975367 is a deficient number, since it is larger than the sum of its proper divisors (99079033).

1666975367 is a wasteful number, since it uses less digits than its factorization.

1666975367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11462.

The product of its digits is 8573040, while the sum is 56.

The square root of 1666975367 is about 40828.6096628332. The cubic root of 1666975367 is about 1185.7042979210.

The spelling of 1666975367 in words is "one billion, six hundred sixty-six million, nine hundred seventy-five thousand, three hundred sixty-seven".